31020123204 has 72 divisors (see below), whose sum is σ = 92932735168. Its totient is φ = 8862890400.

The previous prime is 31020123191. The next prime is 31020123241. The reversal of 31020123204 is 40232102013.

31020123204 is a `hidden beast` number, since 310 + 20 + 12 + 320 + 4 = 666.

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

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, 2272747 + ... + 2286354.

Almost surely, 2^31020123204 is an apocalyptic number.

It is an amenable number.

31020123204 is an abundant number, since it is smaller than the sum of its proper divisors (61912611964).

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

31020123204 is a wasteful number, since it uses less digits than its factorization.

31020123204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4559127 (or 4559113 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 31020123204 its reverse (40232102013), we get a palindrome (71252225217).

The spelling of 31020123204 in words is "thirty-one billion, twenty million, one hundred twenty-three thousand, two hundred four".