170506825121 has 2 divisors, whose sum is σ = 170506825122. Its totient is φ = 170506825120.

The previous prime is 170506825061. The next prime is 170506825123. The reversal of 170506825121 is 121528605071.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 153616963600 + 16889861521 = 391940^2 + 129961^2 .

It is a cyclic number.

It is not a de Polignac number, because 170506825121 - 2¹⁴ = 170506808737 is a prime.

Together with 170506825123, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (170506825123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85253412560 + 85253412561.

It is an arithmetic number, because the mean of its divisors is an integer number (85253412561).

Almost surely, 2^170506825121 is an apocalyptic number.

It is an amenable number.

170506825121 is a deficient number, since it is larger than the sum of its proper divisors (1).

170506825121 is an equidigital number, since it uses as much as digits as its factorization.

170506825121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 33600, while the sum is 38.

The spelling of 170506825121 in words is "one hundred seventy billion, five hundred six million, eight hundred twenty-five thousand, one hundred twenty-one".