131343230431021 has 6 divisors (see below), whose sum is σ = 152787023154510. Its totient is φ = 112579911797976.

The previous prime is 131343230430917. The next prime is 131343230431051. The reversal of 131343230431021 is 120134032343131.

It can be written as a sum of positive squares in only one way, i.e., 66887044402500 + 64456186028521 = 8178450^2 + 8028461^2 .

It is not a de Polignac number, because 131343230431021 - 2¹⁷ = 131343230299949 is a prime.

It is a super-2 number, since 2×131343230431021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131343230431051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1340237045166 + ... + 1340237045263.

It is an arithmetic number, because the mean of its divisors is an integer number (25464503859085).

Almost surely, 2^{131343230431021} is an apocalyptic number.

It is an amenable number.

131343230431021 is a deficient number, since it is larger than the sum of its proper divisors (21443792723489).

131343230431021 is an equidigital number, since it uses as much as digits as its factorization.

131343230431021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2680474090443 (or 2680474090436 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 31.

Adding to 131343230431021 its reverse (120134032343131), we get a palindrome (251477262774152).

The spelling of 131343230431021 in words is "one hundred thirty-one trillion, three hundred forty-three billion, two hundred thirty million, four hundred thirty-one thousand, twenty-one".