231311321121 has 32 divisors (see below), whose sum is σ = 329345856000. Its totient is φ = 143985523968.

The previous prime is 231311321119. The next prime is 231311321179. The reversal of 231311321121 is 121123113132.

231311321121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 231311321121 - 2¹ = 231311321119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231311321191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1923945 + ... + 2040633.

It is an arithmetic number, because the mean of its divisors is an integer number (10292058000).

Almost surely, 2^231311321121 is an apocalyptic number.

It is an amenable number.

231311321121 is a deficient number, since it is larger than the sum of its proper divisors (98034534879).

231311321121 is a wasteful number, since it uses less digits than its factorization.

231311321121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117213.

The product of its digits is 216, while the sum is 21.

Adding to 231311321121 its reverse (121123113132), we get a palindrome (352434434253).

The spelling of 231311321121 in words is "two hundred thirty-one billion, three hundred eleven million, three hundred twenty-one thousand, one hundred twenty-one".