31204040032100 has 144 divisors (see below), whose sum is σ = 78148480343808. Its totient is φ = 10722704002560.

The previous prime is 31204040032079. The next prime is 31204040032153. The reversal of 31204040032100 is 123004040213.

It is a super-2 number, since 2×31204040032100² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12996584 + ... + 15209183.

Almost surely, 2^{31204040032100} is an apocalyptic number.

It is an amenable number.

31204040032100 is an abundant number, since it is smaller than the sum of its proper divisors (46944440311708).

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

31204040032100 is a wasteful number, since it uses less digits than its factorization.

31204040032100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28205854 (or 28205847 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 31204040032100 its reverse (123004040213), we get a palindrome (31327044072313).

The spelling of 31204040032100 in words is "thirty-one trillion, two hundred four billion, forty million, thirty-two thousand, one hundred".