31023123300991 has 2 divisors, whose sum is σ = 31023123300992. Its totient is φ = 31023123300990.

The previous prime is 31023123300989. The next prime is 31023123301013. The reversal of 31023123300991 is 19900332132013.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31023123300991 - 2¹ = 31023123300989 is a prime.

Together with 31023123300989, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 31023123300991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31023123360991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15511561650495 + 15511561650496.

It is an arithmetic number, because the mean of its divisors is an integer number (15511561650496).

Almost surely, 2^{31023123300991} is an apocalyptic number.

31023123300991 is a deficient number, since it is larger than the sum of its proper divisors (1).

31023123300991 is an equidigital number, since it uses as much as digits as its factorization.

31023123300991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26244, while the sum is 37.

The spelling of 31023123300991 in words is "thirty-one trillion, twenty-three billion, one hundred twenty-three million, three hundred thousand, nine hundred ninety-one".