31213302112 has 12 divisors (see below), whose sum is σ = 61451188596. Its totient is φ = 15606651040.

The previous prime is 31213302079. The next prime is 31213302151. The reversal of 31213302112 is 21120331213.

It is a self number, because there is not a number n which added to its sum of digits gives 31213302112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 487707814 + ... + 487707877.

It is an arithmetic number, because the mean of its divisors is an integer number (5120932383).

Almost surely, 2^31213302112 is an apocalyptic number.

31213302112 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31213302112 is a deficient number, since it is larger than the sum of its proper divisors (30237886484).

31213302112 is an equidigital number, since it uses as much as digits as its factorization.

31213302112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975415701 (or 975415693 counting only the distinct ones).

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

Adding to 31213302112 its reverse (21120331213), we get a palindrome (52333633325).

The spelling of 31213302112 in words is "thirty-one billion, two hundred thirteen million, three hundred two thousand, one hundred twelve".