illions
-Illion Numbers
We're all familiar with numbers like million, billion, or trillion - but how far do the "illion" numbers go, the furthest I've seen in the literature is milli-millillion (10^3000003) which I call a micrillion. Some time ago (about 15 years or so),being interested in giant numbers, I have invented names for illion numbers past a centillion (highest that I've seen in books at that time) - by continuing the trend: deci, centi, by using milli, micro, nano, pico, femto, and atto. Sometime later, I found out that I wasn't the only one to choose the name "millillion" for 10^3003 - I found this name mentioned on Robert Munafo's fascinating web site on large numbers. Following is a list of the "illion" numbers (those above millillion are names I invented), along with googol, googolplex, and googolduplex for size reference. The ones less than micrillion are shown on the above mentioned web site, naming rules up to the millillion range are mentioned in The Book of Numbers by Conway and Guy.
Million - 1,000,000
Billion - 1,000,000,000
Trillion - 10^12
Quadrillion - 10^15
Quintillion - 10^18
Sextillion - 10^21
Septillion - 10^24
Octillion - 10^27
Nonillion - 10^30
Decillion - 10^33
Undecillion - 10^36
Doedecillion - 10^39
Tredecillion - 10^42
Quattuordecillion - 10^45
Quindecillion - 10^48
Sexdecillion - 10^51
Septendecillion - 10^54
Octodecillion - 10^57
Novemdecillion - 10^60
Vigintillion - 10^63
Trigintillion - 10^93
Googol - 10^100
Quadragintillion - 10^123
Quinquagintillion - 10^153
Sexagintillion - 10^183
Septuagintillion - 10^213
Octogintillion - 10^243
Nonagintillion - 10^273
Centillion - 10^303
Ducentillion - 10^603
Trecentillion - 10^903
Quadringentillion - 10^1203
Quingentillion - 10^1503
Sescentillion - 10^1803
Septingentillion - 10^2103
Octingentillion - 10^2403
Nongentillion - 10^2703
Millillion - 10^3003
Micrillion - 10^ 3000003
Nanillion - 10^ 3 billion 3
Picillion - 10^ 3 trillion 3
Femtillion - 10^ 3 quadrillion 3
Attillion - 10^ 3 quintillion 3
Zeptillion - 10^ 3 sextillion 3
Yoctillion - 10^ 3 septillion 3
Xonillion - 10^ 3 octillion 3
Vecillion - 10^ 3 nonillion 3
Mecillion - 10^ 3 decillion 3
Duecillion - 10^ 3 undecillion 3
Trecillion - 10^ 3 doedecillion 3
Tetrecillion - 10^ 3 tridecillion 3
Pentecillion - 10^ 3 quattuordecillion 3
Hexecillion - 10^ 3 quindecillion 3
Heptecillion - 10^ 3 sexdecillion 3
Octecillion - 10^ 3 septendecillion 3
Ennecillion - 10^ 3 octodecillion 3
Icosillion - 10^ 3 novemdecillion 3
Triacontillion - 10^ (3x10^90+3)
Googolplex - 10^10^100
Tetracontillion - 10^ (3x10^120+3)
Pentacontillion - 10^ (3x10^150+3)
Hexacontillion - 10^ (3x10^180+3)
Heptacontillion - 10^ (3x10^210+3)
Octacontillion - 10^ (3x10^240+3)
Ennacontillion - 10^ (3x10^270+3)
Hectillion - 10^ (3x10^300+3)
Killillion - 10^ (3x10^3000+3)
Megillion - 10^ (3x10^3million+3)
Gigillion - 10^ (3x10^3billion+3)
Terillion - 10^ (3x10^3trillion+3)
Petillion - 10^ (3x10^3quadrillion+3)
Exillion - 10^ (3x10^3quintillion+3)
Zettillion - 10^ (3x10^3sextillion+3)
Yottillion - 10^ (3x10^3septillion+3)
Xennillion - 10^ (3x10^3octillion+3)
Vekillion - 10^ (3x10^3nonillion+3)
Mekillion - 10^ (3x10^3decillion+3)
Duekillion - 10^ (3x10^3undecillion+3)
Trekillion - 10^ (3x10^3doedecillion+3)
Tetrekillion - 10^ (3x10^3tridecillion+3)
Pentekillion - 10^ (3x10^3quattuordecillion+3)
Hexekillion - 10^ (3x10^3quindecillion+3)
Heptekillion - 10^ (3x10^3sexdecillion+3)
Octekillion - 10^ (3x10^3septendecillion+3)
Ennekillion - 10^ (3x10^3octodecillion+3)
Twentillion - 10^ (3x10^(3x10^60)+3)
Triatwentillion - 10^ (3x10^(3x10^69)+3)
Thirtillion - 10^ (3x10^(3x10^90)+3)
Googolduplex - 10^10^10^100
Fortillion - 10^ (3x10^(3x10^120)+3)
Fiftillion - 10^ (3x10^(3x10^150)+3)
Sixtillion - 10^ (3x10^(3x10^180)+3)
Seventillion - 10^ (3x10^(3x10^210)+3)
Eightillion - 10^ (3x10^(3x10^240)+3)
Nintillion - 10^ (3x10^(3x10^270)+3)
Hundrillion - 10^ (3x10^(3x10^300)+3)
Thousillion - 10^ (3x10^(3x10^3000)+3)
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