20113120100 has 18 divisors (see below), whose sum is σ = 43645470834. Its totient is φ = 8045248000.

The previous prime is 20113120081. The next prime is 20113120127. The reversal of 20113120100 is 102131102.

It can be written as a sum of positive squares in 3 ways, for example, as 6680773696 + 13432346404 = 81736^2 + 115898^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 100565501 + ... + 100565700.

Almost surely, 2^20113120100 is an apocalyptic number.

20113120100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20113120100 is an abundant number, since it is smaller than the sum of its proper divisors (23532350734).

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

20113120100 is a wasteful number, since it uses less digits than its factorization.

20113120100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201131215 (or 201131208 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 20113120100 its reverse (102131102), we get a palindrome (20215251202).

The spelling of 20113120100 in words is "twenty billion, one hundred thirteen million, one hundred twenty thousand, one hundred".