312100219957 has 2 divisors, whose sum is σ = 312100219958. Its totient is φ = 312100219956.

The previous prime is 312100219919. The next prime is 312100219987. The reversal of 312100219957 is 759912001213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 300752431281 + 11347788676 = 548409^2 + 106526^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312100219957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312100219987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156050109978 + 156050109979.

It is an arithmetic number, because the mean of its divisors is an integer number (156050109979).

Almost surely, 2^312100219957 is an apocalyptic number.

It is an amenable number.

312100219957 is a deficient number, since it is larger than the sum of its proper divisors (1).

312100219957 is an equidigital number, since it uses as much as digits as its factorization.

312100219957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34020, while the sum is 40.

The spelling of 312100219957 in words is "three hundred twelve billion, one hundred million, two hundred nineteen thousand, nine hundred fifty-seven".