79102010021 has 16 divisors (see below), whose sum is σ = 87975445248. Its totient is φ = 70740384000.

The previous prime is 79102010017. The next prime is 79102010041. The reversal of 79102010021 is 12001020197.

It is a cyclic number.

It is not a de Polignac number, because 79102010021 - 2² = 79102010017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79102010041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 610850 + ... + 728931.

It is an arithmetic number, because the mean of its divisors is an integer number (5498465328).

Almost surely, 2^79102010021 is an apocalyptic number.

It is an amenable number.

79102010021 is a deficient number, since it is larger than the sum of its proper divisors (8873435227).

79102010021 is a wasteful number, since it uses less digits than its factorization.

79102010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1339972.

The product of its (nonzero) digits is 252, while the sum is 23.

The spelling of 79102010021 in words is "seventy-nine billion, one hundred two million, ten thousand, twenty-one".