21022110010100 has 36 divisors (see below), whose sum is σ = 45636074461068. Its totient is φ = 8405508384000.

The previous prime is 21022110010093. The next prime is 21022110010157. The reversal of 21022110010100 is 101001122012.

It can be written as a sum of positive squares in 6 ways, for example, as 1328200930576 + 19693909079524 = 1152476^2 + 4437782^2 .

It is a congruent number.

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, 41441891 + ... + 41946090.

Almost surely, 2^{21022110010100} is an apocalyptic number.

21022110010100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21022110010100 is an abundant number, since it is smaller than the sum of its proper divisors (24613964450968).

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

21022110010100 is a wasteful number, since it uses less digits than its factorization.

21022110010100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83390516 (or 83390509 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21022110010100 its reverse (101001122012), we get a palindrome (21123111132112).

The spelling of 21022110010100 in words is "twenty-one trillion, twenty-two billion, one hundred ten million, ten thousand, one hundred".