131341340321 has 4 divisors (see below), whose sum is σ = 132923766192. Its totient is φ = 129758914452.

The previous prime is 131341340309. The next prime is 131341340381. The reversal of 131341340321 is 123043143131.

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 a de Polignac number, because none of the positive numbers 2^k-131341340321 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (131341340381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 791212811 + ... + 791212976.

It is an arithmetic number, because the mean of its divisors is an integer number (33230941548).

Almost surely, 2^131341340321 is an apocalyptic number.

It is an amenable number.

131341340321 is a deficient number, since it is larger than the sum of its proper divisors (1582425871).

131341340321 is an equidigital number, since it uses as much as digits as its factorization.

131341340321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1582425870.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 131341340321 its reverse (123043143131), we get a palindrome (254384483452).

The spelling of 131341340321 in words is "one hundred thirty-one billion, three hundred forty-one million, three hundred forty thousand, three hundred twenty-one".