102215716655220 has 108 divisors (see below), whose sum is σ = 360675457371684. Its totient is φ = 23363592376320.

The previous prime is 102215716655167. The next prime is 102215716655249. The reversal of 102215716655220 is 22556617512201.

102215716655220 is a `hidden beast` number, since 1 + 0 + 2 + 2 + 1 + 5 + 71 + 6 + 6 + 552 + 20 = 666.

102215716655220 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 60918462080784 + 41297254574436 = 7805028^2 + 6426294^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5794532941 + ... + 5794550580.

Almost surely, 2^{102215716655220} is an apocalyptic number.

102215716655220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102215716655220 is an abundant number, since it is smaller than the sum of its proper divisors (258459740716464).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102215716655220 is a wasteful number, since it uses less digits than its factorization.

102215716655220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11589083550 (or 11589083538 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 45.

The spelling of 102215716655220 in words is "one hundred two trillion, two hundred fifteen billion, seven hundred sixteen million, six hundred fifty-five thousand, two hundred twenty".