21002203311100 has 36 divisors (see below), whose sum is σ = 49717943113608. Its totient is φ = 7637164840000.

The previous prime is 21002203311071. The next prime is 21002203311101. The reversal of 21002203311100 is 111330220012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002203311101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9546454951 + ... + 9546457150.

It is an arithmetic number, because the mean of its divisors is an integer number (1381053975378).

Almost surely, 2^{21002203311100} is an apocalyptic number.

21002203311100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21002203311100 is an abundant number, since it is smaller than the sum of its proper divisors (28715739802508).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21002203311100 is a wasteful number, since it uses less digits than its factorization.

21002203311100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19092912126 (or 19092912119 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21002203311100 its reverse (111330220012), we get a palindrome (21113533531112).

The spelling of 21002203311100 in words is "twenty-one trillion, two billion, two hundred three million, three hundred eleven thousand, one hundred".