21133131102 has 48 divisors (see below), whose sum is σ = 49373971920. Its totient is φ = 6510844800.

The previous prime is 21133130959. The next prime is 21133131139. The reversal of 21133131102 is 20113133112.

21133131102 is a `hidden beast` number, since 21 + 1 + 331 + 311 + 0 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

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, 739549 + ... + 767592.

It is an arithmetic number, because the mean of its divisors is an integer number (1028624415).

Almost surely, 2^21133131102 is an apocalyptic number.

21133131102 is an abundant number, since it is smaller than the sum of its proper divisors (28240840818).

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

21133131102 is a wasteful number, since it uses less digits than its factorization.

21133131102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1507209 (or 1507206 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 21133131102 its reverse (20113133112), we get a palindrome (41246264214).

The spelling of 21133131102 in words is "twenty-one billion, one hundred thirty-three million, one hundred thirty-one thousand, one hundred two".