231022100512991 has 2 divisors, whose sum is σ = 231022100512992. Its totient is φ = 231022100512990.

The previous prime is 231022100512933. The next prime is 231022100513033. The reversal of 231022100512991 is 199215001220132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231022100512991 - 2³⁰ = 231021026771167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231022100514991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115511050256495 + 115511050256496.

It is an arithmetic number, because the mean of its divisors is an integer number (115511050256496).

Almost surely, 2^{231022100512991} is an apocalyptic number.

231022100512991 is a deficient number, since it is larger than the sum of its proper divisors (1).

231022100512991 is an equidigital number, since it uses as much as digits as its factorization.

231022100512991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 38.

The spelling of 231022100512991 in words is "two hundred thirty-one trillion, twenty-two billion, one hundred million, five hundred twelve thousand, nine hundred ninety-one".