5170170566021 has 2 divisors, whose sum is σ = 5170170566022. Its totient is φ = 5170170566020.

The previous prime is 5170170565993. The next prime is 5170170566129. The reversal of 5170170566021 is 1206650710715.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4214685820900 + 955484745121 = 2052970^2 + 977489^2 .

It is a cyclic number.

It is not a de Polignac number, because 5170170566021 - 2⁴² = 772124054917 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5170170566021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5170170566221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2585085283010 + 2585085283011.

It is an arithmetic number, because the mean of its divisors is an integer number (2585085283011).

Almost surely, 2^{5170170566021} is an apocalyptic number.

It is an amenable number.

5170170566021 is a deficient number, since it is larger than the sum of its proper divisors (1).

5170170566021 is an equidigital number, since it uses as much as digits as its factorization.

5170170566021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 88200, while the sum is 41.

The spelling of 5170170566021 in words is "five trillion, one hundred seventy billion, one hundred seventy million, five hundred sixty-six thousand, twenty-one".