204112222103857 has 2 divisors, whose sum is σ = 204112222103858. Its totient is φ = 204112222103856.

The previous prime is 204112222103819. The next prime is 204112222103887. The reversal of 204112222103857 is 758301222211402.

204112222103857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196236139081761 + 7876083022096 = 14008431^2 + 2806436^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204112222103857 is a prime.

It is not a weakly prime, because it can be changed into another prime (204112222103807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102056111051928 + 102056111051929.

It is an arithmetic number, because the mean of its divisors is an integer number (102056111051929).

Almost surely, 2^{204112222103857} is an apocalyptic number.

It is an amenable number.

204112222103857 is a deficient number, since it is larger than the sum of its proper divisors (1).

204112222103857 is an equidigital number, since it uses as much as digits as its factorization.

204112222103857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 107520, while the sum is 40.

The spelling of 204112222103857 in words is "two hundred four trillion, one hundred twelve billion, two hundred twenty-two million, one hundred three thousand, eight hundred fifty-seven".