131123321201321 has 4 divisors (see below), whose sum is σ = 131123476303044. Its totient is φ = 131123166099600.

The previous prime is 131123321201281. The next prime is 131123321201363. The reversal of 131123321201321 is 123102123321131.

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 38198271225625 + 92925049975696 = 6180475^2 + 9639764^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131123321201321 is a prime.

It is a super-3 number, since 3×131123321201321³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131123321204321) 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, 76275770 + ... + 77975891.

It is an arithmetic number, because the mean of its divisors is an integer number (32780869075761).

Almost surely, 2^{131123321201321} is an apocalyptic number.

It is an amenable number.

131123321201321 is a deficient number, since it is larger than the sum of its proper divisors (155101723).

131123321201321 is an equidigital number, since it uses as much as digits as its factorization.

131123321201321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155101722.

The product of its (nonzero) digits is 1296, while the sum is 26.

Adding to 131123321201321 its reverse (123102123321131), we get a palindrome (254225444522452).

The spelling of 131123321201321 in words is "one hundred thirty-one trillion, one hundred twenty-three billion, three hundred twenty-one million, two hundred one thousand, three hundred twenty-one".