79900220111 has 4 divisors (see below), whose sum is σ = 79901136000. Its totient is φ = 79899304224.

The previous prime is 79900220027. The next prime is 79900220221. The reversal of 79900220111 is 11102200997.

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

It is a cyclic number.

It is not a de Polignac number, because 79900220111 - 2²⁶ = 79833111247 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 (79900240111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 311471 + ... + 506768.

It is an arithmetic number, because the mean of its divisors is an integer number (19975284000).

Almost surely, 2^79900220111 is an apocalyptic number.

79900220111 is a deficient number, since it is larger than the sum of its proper divisors (915889).

79900220111 is an equidigital number, since it uses as much as digits as its factorization.

79900220111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 915888.

The product of its (nonzero) digits is 2268, while the sum is 32.

The spelling of 79900220111 in words is "seventy-nine billion, nine hundred million, two hundred twenty thousand, one hundred eleven".