168580220121 has 12 divisors (see below), whose sum is σ = 245256597040. Its totient is φ = 111578274360.

The previous prime is 168580220111. The next prime is 168580220177. The reversal of 168580220121 is 121022085861.

168580220121 is a `hidden beast` number, since 1 + 68 + 580 + 2 + 2 + 0 + 12 + 1 = 666.

It is not a de Polignac number, because 168580220121 - 2⁵ = 168580220089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168580220111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67376935 + ... + 67379436.

Almost surely, 2^168580220121 is an apocalyptic number.

It is an amenable number.

168580220121 is a deficient number, since it is larger than the sum of its proper divisors (76676376919).

168580220121 is a wasteful number, since it uses less digits than its factorization.

168580220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134756516 (or 134756513 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 36.

The spelling of 168580220121 in words is "one hundred sixty-eight billion, five hundred eighty million, two hundred twenty thousand, one hundred twenty-one".