2131203091 has 2 divisors, whose sum is σ = 2131203092. Its totient is φ = 2131203090.

The previous prime is 2131203059. The next prime is 2131203149. The reversal of 2131203091 is 1903021312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2131203091 - 2⁵ = 2131203059 is a prime.

It is not a weakly prime, because it can be changed into another prime (2131203031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065601545 + 1065601546.

It is an arithmetic number, because the mean of its divisors is an integer number (1065601546).

Almost surely, 2^2131203091 is an apocalyptic number.

2131203091 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131203091 is an equidigital number, since it uses as much as digits as its factorization.

2131203091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 2131203091 is about 46164.9552257987. The cubic root of 2131203091 is about 1286.8905521155.

The spelling of 2131203091 in words is "two billion, one hundred thirty-one million, two hundred three thousand, ninety-one".