31023011212 has 12 divisors (see below), whose sum is σ = 54590217136. Its totient is φ = 15425806320.

The previous prime is 31023011171. The next prime is 31023011281. The reversal of 31023011212 is 21211032013.

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, 21424008 + ... + 21425455.

Almost surely, 2^31023011212 is an apocalyptic number.

It is an amenable number.

31023011212 is a deficient number, since it is larger than the sum of its proper divisors (23567205924).

31023011212 is a wasteful number, since it uses less digits than its factorization.

31023011212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42849648 (or 42849646 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 31023011212 its reverse (21211032013), we get a palindrome (52234043225).

The spelling of 31023011212 in words is "thirty-one billion, twenty-three million, eleven thousand, two hundred twelve".