21032117308177 has 2 divisors, whose sum is σ = 21032117308178. Its totient is φ = 21032117308176.

The previous prime is 21032117308109. The next prime is 21032117308183. The reversal of 21032117308177 is 77180371123012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18335661024256 + 2696456283921 = 4282016^2 + 1642089^2 .

It is a cyclic number.

It is not a de Polignac number, because 21032117308177 - 2²⁷ = 21031983090449 is a prime.

It is not a weakly prime, because it can be changed into another prime (21032117303177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10516058654088 + 10516058654089.

It is an arithmetic number, because the mean of its divisors is an integer number (10516058654089).

Almost surely, 2^{21032117308177} is an apocalyptic number.

It is an amenable number.

21032117308177 is a deficient number, since it is larger than the sum of its proper divisors (1).

21032117308177 is an equidigital number, since it uses as much as digits as its factorization.

21032117308177 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 98784, while the sum is 43.

The spelling of 21032117308177 in words is "twenty-one trillion, thirty-two billion, one hundred seventeen million, three hundred eight thousand, one hundred seventy-seven".