31123231012 has 12 divisors (see below), whose sum is σ = 55278574960. Its totient is φ = 15329352456.

The previous prime is 31123231003. The next prime is 31123231081. The reversal of 31123231012 is 21013232113.

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, 58065462 + ... + 58065997.

Almost surely, 2^31123231012 is an apocalyptic number.

It is an amenable number.

31123231012 is a deficient number, since it is larger than the sum of its proper divisors (24155343948).

31123231012 is a wasteful number, since it uses less digits than its factorization.

31123231012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116131530 (or 116131528 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 31123231012 its reverse (21013232113), we get a palindrome (52136463125).

The spelling of 31123231012 in words is "thirty-one billion, one hundred twenty-three million, two hundred thirty-one thousand, twelve".