21020313112100 has 36 divisors (see below), whose sum is σ = 45616457995248. Its totient is φ = 8407686804000.

The previous prime is 21020313112087. The next prime is 21020313112157. The reversal of 21020313112100 is 121131302012.

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, 3549806 + ... + 7392005.

Almost surely, 2^{21020313112100} is an apocalyptic number.

21020313112100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21020313112100 is an abundant number, since it is smaller than the sum of its proper divisors (24596144883148).

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

21020313112100 is a wasteful number, since it uses less digits than its factorization.

21020313112100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10961036 (or 10961029 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21020313112100 its reverse (121131302012), we get a palindrome (21141444414112).

The spelling of 21020313112100 in words is "twenty-one trillion, twenty billion, three hundred thirteen million, one hundred twelve thousand, one hundred".