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For Tiaokhiao's decillion, see nonillion.A decillion is equal to 1033 in America, or 1060 in France and Germany.[1]

In the long scale, 1033 is called quintilliard, which is commonly used in France and Germany.

This number is also called hendekillion in Russ Rowlett's Greek-based naming system.[2]

Aarex Tiaokhiao gave the name mecillion, referring to the value of this number.[3]

Written out in decimal form decillion (in the short scale) is:

1000000000000000000000000000000000

In long scale:

1000000000000000000000000000000000000000000000000000000000000

## Decimal Edit

• 1,000,000,000,000,000,000,000,000,000,000,000 - short scale
• 1,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000 - long scale

## Examples Edit

• The mass of the sun is about 1.989 decillion grams.
• The Area of the Milky Way galaxy is approximately 702 decillion square kilometers.[4]
• The SI prefix henda- multiplies by one decillion.

## Approximations Edit

For short scale:

Notation Lower bound Upper bound
Scientific notation $$1\times10^{33}$$
Arrow notation $$10\uparrow33$$
Steinhaus-Moser Notation 23[3] 24[3]
Copy notation 9[33] 10[17]
Taro's multivariable Ackermann function A(3,106) A(3,107)
Pound-Star Notation #*(4,6,4,0,2)*5 #*(1,0,1,3)*7
BEAF {10,33}
Hyper-E notation E33
Bashicu matrix system (0)(0)(0)[13335] (0)(0)(0)[13336]
Hyperfactorial array notation 30! 31!
Fast-growing hierarchy $$f_2(102)$$ $$f_2(103)$$
Hardy hierarchy $$H_{\omega^2}(102)$$ $$H_{\omega^2}(103)$$
Slow-growing hierarchy $$g_{\omega^{\omega3+3}}(10)$$

For long scale:

Notation Lower bound Upper bound
Scientific notation $$1\times10^{60}$$
Arrow notation $$10\uparrow60$$
Steinhaus-Moser Notation 37[3] 38[3]
Copy notation 9[60] 1[61]
Taro's multivariable Ackermann function A(3,196) A(3,197)
Pound-Star Notation #*(9,5,0,3,3,7)*6 #*(0,6,0,3,3,7)*6
BEAF {10,60}
Hyper-E notation E60
Bashicu matrix system (0)(0)(0)(0)[5623] (0)(0)(0)(0)[5624]
Hyperfactorial array notation 47! 48!
Fast-growing hierarchy $$f_2(191)$$ $$f_2(192)$$
Hardy hierarchy $$H_{\omega^2}(191)$$ $$H_{\omega^2}(192)$$
Slow-growing hierarchy $$g_{\omega^{\omega6}}(10)$$

## List of prefixed numbers derived from decillionEdit

Name Short scale Long scale
undecillion 1036 1066
duodecillion 1039 1072
tredecillion 1042 1078
quattuordecillion 1045 1084
quindecillion 1048 1090
sexdecillion 1051 1096
septendecillion 1054 10102
octodecillion 1057 10108
novemdecillion 1060 10114