131343132421 has 8 divisors (see below), whose sum is σ = 139127454360. Its totient is φ = 123565283328.

The previous prime is 131343132413. The next prime is 131343132443. The reversal of 131343132421 is 124231343131.

It can be written as a sum of positive squares in 4 ways, for example, as 22864464100 + 108478668321 = 151210^2 + 329361^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131343132421 - 2³ = 131343132413 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131343132421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131343132461) 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 in 7 ways as a sum of consecutive naturals, for example, 1576396 + ... + 1657621.

It is an arithmetic number, because the mean of its divisors is an integer number (17390931795).

Almost surely, 2^131343132421 is an apocalyptic number.

It is an amenable number.

131343132421 is a deficient number, since it is larger than the sum of its proper divisors (7784321939).

131343132421 is a wasteful number, since it uses less digits than its factorization.

131343132421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3236423.

The product of its digits is 5184, while the sum is 28.

Adding to 131343132421 its reverse (124231343131), we get a palindrome (255574475552).

The spelling of 131343132421 in words is "one hundred thirty-one billion, three hundred forty-three million, one hundred thirty-two thousand, four hundred twenty-one".