31321112002057 has 2 divisors, whose sum is σ = 31321112002058. Its totient is φ = 31321112002056.

The previous prime is 31321112002043. The next prime is 31321112002153. The reversal of 31321112002057 is 75020021112313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18363444697081 + 12957667304976 = 4285259^2 + 3599676^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31321112002057 is a prime.

It is not a weakly prime, because it can be changed into another prime (31321112002657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15660556001028 + 15660556001029.

It is an arithmetic number, because the mean of its divisors is an integer number (15660556001029).

Almost surely, 2^{31321112002057} is an apocalyptic number.

It is an amenable number.

31321112002057 is a deficient number, since it is larger than the sum of its proper divisors (1).

31321112002057 is an equidigital number, since it uses as much as digits as its factorization.

31321112002057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 28.

The spelling of 31321112002057 in words is "thirty-one trillion, three hundred twenty-one billion, one hundred twelve million, two thousand, fifty-seven".