2111112191 has 2 divisors, whose sum is σ = 2111112192. Its totient is φ = 2111112190.

The previous prime is 2111112167. The next prime is 2111112229. The reversal of 2111112191 is 1912111112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2111112191 - 2⁶ = 2111112127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2111112151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055556095 + 1055556096.

It is an arithmetic number, because the mean of its divisors is an integer number (1055556096).

Almost surely, 2^2111112191 is an apocalyptic number.

2111112191 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111112191 is an equidigital number, since it uses as much as digits as its factorization.

2111112191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36, while the sum is 20.

The square root of 2111112191 is about 45946.8409251387. The cubic root of 2111112191 is about 1282.8339291600.

The spelling of 2111112191 in words is "two billion, one hundred eleven million, one hundred twelve thousand, one hundred ninety-one".