231311123291 has 2 divisors, whose sum is σ = 231311123292. Its totient is φ = 231311123290.

The previous prime is 231311123269. The next prime is 231311123321. The reversal of 231311123291 is 192321113132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231311123291 - 2²⁶ = 231244014427 is a prime.

It is not a weakly prime, because it can be changed into another prime (231311123261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115655561645 + 115655561646.

It is an arithmetic number, because the mean of its divisors is an integer number (115655561646).

Almost surely, 2^231311123291 is an apocalyptic number.

231311123291 is a deficient number, since it is larger than the sum of its proper divisors (1).

231311123291 is an equidigital number, since it uses as much as digits as its factorization.

231311123291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 29.

The spelling of 231311123291 in words is "two hundred thirty-one billion, three hundred eleven million, one hundred twenty-three thousand, two hundred ninety-one".