2131110391 has 2 divisors, whose sum is σ = 2131110392. Its totient is φ = 2131110390.

The previous prime is 2131110353. The next prime is 2131110413. The reversal of 2131110391 is 1930111312.

It is an a-pointer prime, because the next prime (2131110413) can be obtained adding 2131110391 to its sum of digits (22).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2131110391 - 2¹³ = 2131102199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2135110391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065555195 + 1065555196.

It is an arithmetic number, because the mean of its divisors is an integer number (1065555196).

Almost surely, 2^2131110391 is an apocalyptic number.

2131110391 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131110391 is an equidigital number, since it uses as much as digits as its factorization.

2131110391 is an odious number, because the sum of its binary digits is odd.

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

The square root of 2131110391 is about 46163.9512065421. The cubic root of 2131110391 is about 1286.8718934082.

The spelling of 2131110391 in words is "two billion, one hundred thirty-one million, one hundred ten thousand, three hundred ninety-one".