201042957931217 has 2 divisors, whose sum is σ = 201042957931218. Its totient is φ = 201042957931216.

The previous prime is 201042957931111. The next prime is 201042957931243. The reversal of 201042957931217 is 712139759240102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143999016001681 + 57043941929536 = 11999959^2 + 7552744^2 .

It is a cyclic number.

It is not a de Polignac number, because 201042957931217 - 2⁸ = 201042957930961 is a prime.

It is not a weakly prime, because it can be changed into another prime (201042957931267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100521478965608 + 100521478965609.

It is an arithmetic number, because the mean of its divisors is an integer number (100521478965609).

Almost surely, 2^{201042957931217} is an apocalyptic number.

It is an amenable number.

201042957931217 is a deficient number, since it is larger than the sum of its proper divisors (1).

201042957931217 is an equidigital number, since it uses as much as digits as its factorization.

201042957931217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1905120, while the sum is 53.

The spelling of 201042957931217 in words is "two hundred one trillion, forty-two billion, nine hundred fifty-seven million, nine hundred thirty-one thousand, two hundred seventeen".