2122112191 has 4 divisors (see below), whose sum is σ = 2122867800. Its totient is φ = 2121356584.

The previous prime is 2122112189. The next prime is 2122112219. The reversal of 2122112191 is 1912112212.

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 2122112191 - 2¹ = 2122112189 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 (2122112101) 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, 373576 + ... + 379213.

It is an arithmetic number, because the mean of its divisors is an integer number (530716950).

Almost surely, 2^2122112191 is an apocalyptic number.

2122112191 is a deficient number, since it is larger than the sum of its proper divisors (755609).

2122112191 is an equidigital number, since it uses as much as digits as its factorization.

2122112191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755608.

The product of its digits is 144, while the sum is 22.

The square root of 2122112191 is about 46066.3889511648. The cubic root of 2122112191 is about 1285.0581493466.

The spelling of 2122112191 in words is "two billion, one hundred twenty-two million, one hundred twelve thousand, one hundred ninety-one".