231023013012 has 72 divisors (see below), whose sum is σ = 670593137760. Its totient is φ = 66322393920.

The previous prime is 231023013007. The next prime is 231023013037. The reversal of 231023013012 is 210310320132.

It is a super-2 number, since 2×231023013012² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15344883 + ... + 15359930.

It is an arithmetic number, because the mean of its divisors is an integer number (9313793580).

Almost surely, 2^231023013012 is an apocalyptic number.

231023013012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

231023013012 is an abundant number, since it is smaller than the sum of its proper divisors (439570124748).

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

231023013012 is a wasteful number, since it uses less digits than its factorization.

231023013012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30704853 (or 30704848 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 231023013012 its reverse (210310320132), we get a palindrome (441333333144).

The spelling of 231023013012 in words is "two hundred thirty-one billion, twenty-three million, thirteen thousand, twelve".