131120304323509 has 2 divisors, whose sum is σ = 131120304323510. Its totient is φ = 131120304323508.

The previous prime is 131120304323497. The next prime is 131120304323543. The reversal of 131120304323509 is 905323403021131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109233392384484 + 21886911939025 = 10451478^2 + 4678345^2 .

It is a cyclic number.

It is not a de Polignac number, because 131120304323509 - 2²¹ = 131120302226357 is a prime.

It is a super-2 number, since 2×131120304323509² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131120304323549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65560152161754 + 65560152161755.

It is an arithmetic number, because the mean of its divisors is an integer number (65560152161755).

Almost surely, 2^{131120304323509} is an apocalyptic number.

It is an amenable number.

131120304323509 is a deficient number, since it is larger than the sum of its proper divisors (1).

131120304323509 is an equidigital number, since it uses as much as digits as its factorization.

131120304323509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 37.

The spelling of 131120304323509 in words is "one hundred thirty-one trillion, one hundred twenty billion, three hundred four million, three hundred twenty-three thousand, five hundred nine".