131323322321 has 4 divisors (see below), whose sum is σ = 139048223652. Its totient is φ = 123598420992.

The previous prime is 131323322309. The next prime is 131323322369. The reversal of 131323322321 is 123223323131.

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 45511822225 + 85811500096 = 213335^2 + 292936^2 .

It is a cyclic number.

It is not a de Polignac number, because 131323322321 - 2¹⁴ = 131323305937 is a prime.

It is a super-3 number, since 3×131323322321³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131323322021) 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, 3862450640 + ... + 3862450673.

It is an arithmetic number, because the mean of its divisors is an integer number (34762055913).

Almost surely, 2^131323322321 is an apocalyptic number.

It is an amenable number.

131323322321 is a deficient number, since it is larger than the sum of its proper divisors (7724901331).

131323322321 is an equidigital number, since it uses as much as digits as its factorization.

131323322321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7724901330.

The product of its digits is 3888, while the sum is 26.

Adding to 131323322321 its reverse (123223323131), we get a palindrome (254546645452).

The spelling of 131323322321 in words is "one hundred thirty-one billion, three hundred twenty-three million, three hundred twenty-two thousand, three hundred twenty-one".