131323321100321 has 4 divisors (see below), whose sum is σ = 150083795543232. Its totient is φ = 112562846657412.

The previous prime is 131323321100203. The next prime is 131323321100339. The reversal of 131323321100321 is 123001123323131.

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 131323321100321 - 2³⁸ = 131048443193377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131323321100341) 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, 9380237221445 + ... + 9380237221458.

It is an arithmetic number, because the mean of its divisors is an integer number (37520948885808).

Almost surely, 2^{131323321100321} is an apocalyptic number.

It is an amenable number.

131323321100321 is a deficient number, since it is larger than the sum of its proper divisors (18760474442911).

131323321100321 is an equidigital number, since it uses as much as digits as its factorization.

131323321100321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18760474442910.

The product of its (nonzero) digits is 1944, while the sum is 26.

Adding to 131323321100321 its reverse (123001123323131), we get a palindrome (254324444423452).

The spelling of 131323321100321 in words is "one hundred thirty-one trillion, three hundred twenty-three billion, three hundred twenty-one million, one hundred thousand, three hundred twenty-one".