2112191 has 2 divisors, whose sum is σ = 2112192. Its totient is φ = 2112190.

The previous prime is 2112169. The next prime is 2112193. The reversal of 2112191 is 1912112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2112191 - 2⁶ = 2112127 is a prime.

It is a super-2 number, since 2×2112191² = 8922701640962, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 2112193, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2112193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056095 + 1056096.

It is an arithmetic number, because the mean of its divisors is an integer number (1056096).

2^2112191 is an apocalyptic number.

2112191 is a deficient number, since it is larger than the sum of its proper divisors (1).

2112191 is an equidigital number, since it uses as much as digits as its factorization.

2112191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36, while the sum is 17.

The square root of 2112191 is about 1453.3378822559. The cubic root of 2112191 is about 128.3052407541.

It can be divided in two parts, 21121 and 91, that added together give a palindrome (21212).

The spelling of 2112191 in words is "two million, one hundred twelve thousand, one hundred ninety-one".