sextillion

The cardinal number equal to 10²¹.

The cardinal number equal to 10³⁶.

According to English and original Italian numeration, a million raised to the sixth power; a number represented by unity with thirty-six ciphers annexed; according to French numeration, commonly taught in America, a thousand raised to the seventh power; a thousand quintillions.

According to the method of numeration (which is followed also in the United States), the number expressed by a unit with twenty-one ciphers annexed. According to the English method, a million raised to the sixth power, or the number expressed by a unit with thirty-six ciphers annexed. See numeration.

A trillion billion: 1 followed by 21 zeros, 1021.

A million quintillion: 1 followed by 36 zeros, 1036.

the number that is represented as a one followed by 21 zeros