A sextillion has 21 zeros in all.
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Twenty one zeroes is a sextillion: 1,000,000,000,000,000,000,000.
Trillion has 12 zeroes like 3,000,000,000,000 Next to trillion is quadrillion with 15 zeroes then quintillion with 18 zeroes then sextillion with 21 zeroes
In the short scale system, used most frequently in North America, a sextillion is equal to 1,000,000,000,000,000,000,000 (one followed by 21 zeroes, or 1021). In the long scale system, used most frequently in the United Kingdom and continental Europe, a sextillion is equal to a 1,000,000,000,000,000,000,000,000,000,000,000,000 (one followed by 36 zeroes, or 1036).
A sextillion, a 1 followed by 21 zeroes (1021), comes next. It is 1,000 times a quintillion.
10 sextillion would be 10,000,000,000 trillion.