31013123312 has 20 divisors (see below), whose sum is σ = 63250449480. Its totient is φ = 14690426688.

The previous prime is 31013123311. The next prime is 31013123329. The reversal of 31013123312 is 21332131013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31013123311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51008123 + ... + 51008730.

It is an arithmetic number, because the mean of its divisors is an integer number (3162522474).

Almost surely, 2^31013123312 is an apocalyptic number.

It is an amenable number.

31013123312 is an abundant number, since it is smaller than the sum of its proper divisors (32237326168).

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

31013123312 is a wasteful number, since it uses less digits than its factorization.

31013123312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102016880 (or 102016874 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 31013123312 its reverse (21332131013), we get a palindrome (52345254325).

The spelling of 31013123312 in words is "thirty-one billion, thirteen million, one hundred twenty-three thousand, three hundred twelve".