31220012204 has 12 divisors (see below), whose sum is σ = 54940246200. Its totient is φ = 15522799008.

The previous prime is 31220012141. The next prime is 31220012249. The reversal of 31220012204 is 40221002213.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21800969 + ... + 21802400.

It is an arithmetic number, because the mean of its divisors is an integer number (4578353850).

Almost surely, 2^31220012204 is an apocalyptic number.

It is an amenable number.

31220012204 is a deficient number, since it is larger than the sum of its proper divisors (23720233996).

31220012204 is a wasteful number, since it uses less digits than its factorization.

31220012204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43603552 (or 43603550 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 31220012204 its reverse (40221002213), we get a palindrome (71441014417).

Subtracting 31220012204 from its reverse (40221002213), we obtain a palindrome (9000990009).

The spelling of 31220012204 in words is "thirty-one billion, two hundred twenty million, twelve thousand, two hundred four".