2113031191 has 2 divisors, whose sum is σ = 2113031192. Its totient is φ = 2113031190.

The previous prime is 2113031177. The next prime is 2113031231. The reversal of 2113031191 is 1911303112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2113031191 - 2⁵ = 2113031159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2113031111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056515595 + 1056515596.

It is an arithmetic number, because the mean of its divisors is an integer number (1056515596).

Almost surely, 2^2113031191 is an apocalyptic number.

2113031191 is a deficient number, since it is larger than the sum of its proper divisors (1).

2113031191 is an equidigital number, since it uses as much as digits as its factorization.

2113031191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 2113031191 is about 45967.7190101924. The cubic root of 2113031191 is about 1283.2225099255. Note that the first 3 decimals are identical.

The spelling of 2113031191 in words is "two billion, one hundred thirteen million, thirty-one thousand, one hundred ninety-one".