231313123231 has 2 divisors, whose sum is σ = 231313123232. Its totient is φ = 231313123230.

The previous prime is 231313123229. The next prime is 231313123241. The reversal of 231313123231 is 132321313132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231313123231 - 2¹ = 231313123229 is a prime.

It is a super-2 number, since 2×231313123231² (a number of 24 digits) contains 22 as substring.

Together with 231313123229, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 231313123196 and 231313123205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231313123241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115656561615 + 115656561616.

It is an arithmetic number, because the mean of its divisors is an integer number (115656561616).

Almost surely, 2^231313123231 is an apocalyptic number.

231313123231 is a deficient number, since it is larger than the sum of its proper divisors (1).

231313123231 is an equidigital number, since it uses as much as digits as its factorization.

231313123231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 25.

Adding to 231313123231 its reverse (132321313132), we get a palindrome (363634436363).

The spelling of 231313123231 in words is "two hundred thirty-one billion, three hundred thirteen million, one hundred twenty-three thousand, two hundred thirty-one".