2112188879 has 4 divisors (see below), whose sum is σ = 2112487584. Its totient is φ = 2111890176.

The previous prime is 2112188857. The next prime is 2112188893. The reversal of 2112188879 is 9788812112.

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 2112188879 - 2²⁴ = 2095411663 is a prime.

It is a super-2 number, since 2×2112188879² = 8922683721142553282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112181879) 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, 138482 + ... + 152975.

It is an arithmetic number, because the mean of its divisors is an integer number (528121896).

Almost surely, 2^2112188879 is an apocalyptic number.

2112188879 is a deficient number, since it is larger than the sum of its proper divisors (298705).

2112188879 is an equidigital number, since it uses as much as digits as its factorization.

2112188879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298704.

The product of its digits is 129024, while the sum is 47.

The square root of 2112188879 is about 45958.5561022102. The cubic root of 2112188879 is about 1283.0519780727.

The spelling of 2112188879 in words is "two billion, one hundred twelve million, one hundred eighty-eight thousand, eight hundred seventy-nine".