21023331132100 has 36 divisors (see below), whose sum is σ = 49767958428048. Its totient is φ = 7644847684000.

The previous prime is 21023331132029. The next prime is 21023331132143. The reversal of 21023331132100 is 123113332012.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9556058506 + ... + 9556060705.

It is an arithmetic number, because the mean of its divisors is an integer number (1382443289668).

Almost surely, 2^{21023331132100} is an apocalyptic number.

21023331132100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21023331132100 is an abundant number, since it is smaller than the sum of its proper divisors (28744627295948).

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

21023331132100 is a wasteful number, since it uses less digits than its factorization.

21023331132100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19112119236 (or 19112119229 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 21023331132100 its reverse (123113332012), we get a palindrome (21146444464112).

The spelling of 21023331132100 in words is "twenty-one trillion, twenty-three billion, three hundred thirty-one million, one hundred thirty-two thousand, one hundred".