2112012191 has 4 divisors (see below), whose sum is σ = 2203838832. Its totient is φ = 2020185552.

The previous prime is 2112012181. The next prime is 2112012193. The reversal of 2112012191 is 1912102112.

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 2112012191 - 2³⁰ = 1038270367 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 (2112012193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45913286 + ... + 45913331.

It is an arithmetic number, because the mean of its divisors is an integer number (550959708).

Almost surely, 2^2112012191 is an apocalyptic number.

2112012191 is a deficient number, since it is larger than the sum of its proper divisors (91826641).

2112012191 is an equidigital number, since it uses as much as digits as its factorization.

2112012191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91826640.

The product of its (nonzero) digits is 72, while the sum is 20.

The square root of 2112012191 is about 45956.6338084068. The cubic root of 2112012191 is about 1283.0162006205.

The spelling of 2112012191 in words is "two billion, one hundred twelve million, twelve thousand, one hundred ninety-one".