131404243340321 has 4 divisors (see below), whose sum is σ = 150176278103232. Its totient is φ = 112632208577412.

The previous prime is 131404243340287. The next prime is 131404243340323. The reversal of 131404243340321 is 123043342404131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131404243340321 - 2²² = 131404239146017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131404243340323) 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, 9386017381445 + ... + 9386017381458.

It is an arithmetic number, because the mean of its divisors is an integer number (37544069525808).

Almost surely, 2^{131404243340321} is an apocalyptic number.

It is an amenable number.

131404243340321 is a deficient number, since it is larger than the sum of its proper divisors (18772034762911).

131404243340321 is an equidigital number, since it uses as much as digits as its factorization.

131404243340321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18772034762910.

The product of its (nonzero) digits is 82944, while the sum is 35.

Adding to 131404243340321 its reverse (123043342404131), we get a palindrome (254447585744452).

The spelling of 131404243340321 in words is "one hundred thirty-one trillion, four hundred four billion, two hundred forty-three million, three hundred forty thousand, three hundred twenty-one".