One sextillion.
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number 1 followed by 21 zeros
Ten Quintillions 1 followed by 18 zeros (one to the power of ten to the 18th) is One Quintillion 1 followed by 19 zeros (one to the power of ten to the 19th) is Ten Quintillion 1 followed by 20 zeros (one to the power of ten to the 20th) is One Hundred Quintillion 1 followed by 21 zeros (one to the power of ten to the 21st) is One Sextillion & so on...
A number followed by 23 zeros is called a "septillion" in the short scale naming system used in the US and modern British English. In the long scale system used in some European countries, it is called a "trilliard." This number is represented by 1 followed by 24 zeros in standard numerical notation.
There are 21 zeros in a sextillion. in other words, it is a 1 followed by 21 zeros. example: 1,000,000,000,000,000,000,000.
133 followed by 21 zeros.