231311321022 has 32 divisors (see below), whose sum is σ = 465167727648. Its totient is φ = 76679847936.

The previous prime is 231311320967. The next prime is 231311321053. The reversal of 231311321022 is 220123113132.

It is a self number, because there is not a number n which added to its sum of digits gives 231311321022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3806308 + ... + 3866600.

It is an arithmetic number, because the mean of its divisors is an integer number (14536491489).

Almost surely, 2^231311321022 is an apocalyptic number.

231311321022 is an abundant number, since it is smaller than the sum of its proper divisors (233856406626).

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

231311321022 is a wasteful number, since it uses less digits than its factorization.

231311321022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63804.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 231311321022 its reverse (220123113132), we get a palindrome (451434434154).

The spelling of 231311321022 in words is "two hundred thirty-one billion, three hundred eleven million, three hundred twenty-one thousand, twenty-two".