79220122021 has 4 divisors (see below), whose sum is σ = 79226970592. Its totient is φ = 79213273452.

The previous prime is 79220122019. The next prime is 79220122039. The reversal of 79220122021 is 12022102297.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 79220122021 - 2¹ = 79220122019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79220122001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3406905 + ... + 3430078.

It is an arithmetic number, because the mean of its divisors is an integer number (19806742648).

Almost surely, 2^79220122021 is an apocalyptic number.

It is an amenable number.

79220122021 is a deficient number, since it is larger than the sum of its proper divisors (6848571).

79220122021 is a wasteful number, since it uses less digits than its factorization.

79220122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6848570.

The product of its (nonzero) digits is 2016, while the sum is 28.

The spelling of 79220122021 in words is "seventy-nine billion, two hundred twenty million, one hundred twenty-two thousand, twenty-one".