31311211123723 has 2 divisors, whose sum is σ = 31311211123724. Its totient is φ = 31311211123722.

The previous prime is 31311211123681. The next prime is 31311211123771. The reversal of 31311211123723 is 32732111211313.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31311211123723 - 2²⁵ = 31311177569291 is a prime.

It is not a weakly prime, because it can be changed into another prime (31311211723723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15655605561861 + 15655605561862.

It is an arithmetic number, because the mean of its divisors is an integer number (15655605561862).

Almost surely, 2^{31311211123723} is an apocalyptic number.

31311211123723 is a deficient number, since it is larger than the sum of its proper divisors (1).

31311211123723 is an equidigital number, since it uses as much as digits as its factorization.

31311211123723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 31.

The spelling of 31311211123723 in words is "thirty-one trillion, three hundred eleven billion, two hundred eleven million, one hundred twenty-three thousand, seven hundred twenty-three".