131031411421 has 4 divisors (see below), whose sum is σ = 132382250812. Its totient is φ = 129680572032.

The previous prime is 131031411397. The next prime is 131031411449. The reversal of 131031411421 is 124114130131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 36773815225 + 94257596196 = 191765^2 + 307014^2 .

It is a cyclic number.

It is not a de Polignac number, because 131031411421 - 2⁷ = 131031411293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131031411392 and 131031411401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131031411451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 675419550 + ... + 675419743.

It is an arithmetic number, because the mean of its divisors is an integer number (33095562703).

Almost surely, 2^131031411421 is an apocalyptic number.

It is an amenable number.

131031411421 is a deficient number, since it is larger than the sum of its proper divisors (1350839391).

131031411421 is an equidigital number, since it uses as much as digits as its factorization.

131031411421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1350839390.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 131031411421 its reverse (124114130131), we get a palindrome (255145541552).

The spelling of 131031411421 in words is "one hundred thirty-one billion, thirty-one million, four hundred eleven thousand, four hundred twenty-one".