31231131302099 has 2 divisors, whose sum is σ = 31231131302100. Its totient is φ = 31231131302098.

The previous prime is 31231131302093. The next prime is 31231131302177. The reversal of 31231131302099 is 99020313113213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31231131302099 - 2⁴⁴ = 13638945257683 is a prime.

It is not a weakly prime, because it can be changed into another prime (31231131302093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15615565651049 + 15615565651050.

It is an arithmetic number, because the mean of its divisors is an integer number (15615565651050).

Almost surely, 2^{31231131302099} is an apocalyptic number.

31231131302099 is a deficient number, since it is larger than the sum of its proper divisors (1).

31231131302099 is an equidigital number, since it uses as much as digits as its factorization.

31231131302099 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 38.

The spelling of 31231131302099 in words is "thirty-one trillion, two hundred thirty-one billion, one hundred thirty-one million, three hundred two thousand, ninety-nine".