10131330991 has 2 divisors, whose sum is σ = 10131330992. Its totient is φ = 10131330990.

The previous prime is 10131330971. The next prime is 10131331027. The reversal of 10131330991 is 19903313101.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10131330991 - 2⁵ = 10131330959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10131330941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5065665495 + 5065665496.

It is an arithmetic number, because the mean of its divisors is an integer number (5065665496).

Almost surely, 2^10131330991 is an apocalyptic number.

10131330991 is a deficient number, since it is larger than the sum of its proper divisors (1).

10131330991 is an equidigital number, since it uses as much as digits as its factorization.

10131330991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2187, while the sum is 31.

The spelling of 10131330991 in words is "ten billion, one hundred thirty-one million, three hundred thirty thousand, nine hundred ninety-one".