231320022999991 has 2 divisors, whose sum is σ = 231320022999992. Its totient is φ = 231320022999990.

The previous prime is 231320022999979. The next prime is 231320023000009. The reversal of 231320022999991 is 199999220023132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231320022999991 - 2⁵ = 231320022999959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231320022999391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115660011499995 + 115660011499996.

It is an arithmetic number, because the mean of its divisors is an integer number (115660011499996).

Almost surely, 2^{231320022999991} is an apocalyptic number.

231320022999991 is a deficient number, since it is larger than the sum of its proper divisors (1).

231320022999991 is an equidigital number, since it uses as much as digits as its factorization.

231320022999991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8503056, while the sum is 61.

The spelling of 231320022999991 in words is "two hundred thirty-one trillion, three hundred twenty billion, twenty-two million, nine hundred ninety-nine thousand, nine hundred ninety-one".