231311013102 has 48 divisors (see below), whose sum is σ = 539896790160. Its totient is φ = 71150057856.

The previous prime is 231311013029. The next prime is 231311013137. The reversal of 231311013102 is 201310113132.

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, 590674 + ... + 900842.

It is an arithmetic number, because the mean of its divisors is an integer number (11247849795).

Almost surely, 2^231311013102 is an apocalyptic number.

231311013102 is an abundant number, since it is smaller than the sum of its proper divisors (308585777058).

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

231311013102 is a wasteful number, since it uses less digits than its factorization.

231311013102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313377 (or 313374 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 231311013102 its reverse (201310113132), we get a palindrome (432621126234).

The spelling of 231311013102 in words is "two hundred thirty-one billion, three hundred eleven million, thirteen thousand, one hundred two".