102055121572165 has 4 divisors (see below), whose sum is σ = 122466145886604. Its totient is φ = 81644097257728.

The previous prime is 102055121572153. The next prime is 102055121572177. The reversal of 102055121572165 is 561275121550201.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (102055121572153) and next prime (102055121572177).

It can be written as a sum of positive squares in 2 ways, for example, as 11951305328356 + 90103816243809 = 3457066^2 + 9492303^2 .

It is a cyclic number.

It is not a de Polignac number, because 102055121572165 - 2²⁹ = 102054584701253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10205512157212 + ... + 10205512157221.

It is an arithmetic number, because the mean of its divisors is an integer number (30616536471651).

Almost surely, 2^{102055121572165} is an apocalyptic number.

It is an amenable number.

102055121572165 is a deficient number, since it is larger than the sum of its proper divisors (20411024314439).

102055121572165 is an equidigital number, since it uses as much as digits as its factorization.

102055121572165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20411024314438.

The product of its (nonzero) digits is 210000, while the sum is 43.

The spelling of 102055121572165 in words is "one hundred two trillion, fifty-five billion, one hundred twenty-one million, five hundred seventy-two thousand, one hundred sixty-five".