20113010021100 has 72 divisors (see below), whose sum is σ = 58194557809920. Its totient is φ = 5363384962880.

The previous prime is 20113010021077. The next prime is 20113010021123. The reversal of 20113010021100 is 112001031102.

It is an interprime number because it is at equal distance from previous prime (20113010021077) and next prime (20113010021123).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19889521 + ... + 20876279.

It is an arithmetic number, because the mean of its divisors is an integer number (808257747360).

Almost surely, 2^{20113010021100} is an apocalyptic number.

20113010021100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20113010021100 is an abundant number, since it is smaller than the sum of its proper divisors (38081547788820).

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

20113010021100 is a wasteful number, since it uses less digits than its factorization.

20113010021100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1054719 (or 1054712 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 20113010021100 its reverse (112001031102), we get a palindrome (20225011052202).

The spelling of 20113010021100 in words is "twenty trillion, one hundred thirteen billion, ten million, twenty-one thousand, one hundred".