31312202012 has 48 divisors (see below), whose sum is σ = 71408836800. Its totient is φ = 11658580992.

The previous prime is 31312201979. The next prime is 31312202017. The reversal of 31312202012 is 21020221313.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31312202017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2523887 + ... + 2536262.

It is an arithmetic number, because the mean of its divisors is an integer number (1487684100).

Almost surely, 2^31312202012 is an apocalyptic number.

It is an amenable number.

31312202012 is an abundant number, since it is smaller than the sum of its proper divisors (40096634788).

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

31312202012 is a wasteful number, since it uses less digits than its factorization.

31312202012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5060190 (or 5060188 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 31312202012 its reverse (21020221313), we get a palindrome (52332423325).

The spelling of 31312202012 in words is "thirty-one billion, three hundred twelve million, two hundred two thousand, twelve".