131113948921 has 2 divisors, whose sum is σ = 131113948922. Its totient is φ = 131113948920.

The previous prime is 131113948897. The next prime is 131113948943. The reversal of 131113948921 is 129849311131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119159588025 + 11954360896 = 345195^2 + 109336^2 .

It is a cyclic number.

It is not a de Polignac number, because 131113948921 - 2²⁷ = 130979731193 is a prime.

It is not a weakly prime, because it can be changed into another prime (131113948981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65556974460 + 65556974461.

It is an arithmetic number, because the mean of its divisors is an integer number (65556974461).

Almost surely, 2^131113948921 is an apocalyptic number.

It is an amenable number.

131113948921 is a deficient number, since it is larger than the sum of its proper divisors (1).

131113948921 is an equidigital number, since it uses as much as digits as its factorization.

131113948921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 43.

The spelling of 131113948921 in words is "one hundred thirty-one billion, one hundred thirteen million, nine hundred forty-eight thousand, nine hundred twenty-one".