12131321333331 has 4 divisors (see below), whose sum is σ = 16175095111112. Its totient is φ = 8087547555552.

The previous prime is 12131321333311. The next prime is 12131321333333. The reversal of 12131321333331 is 13333312313121.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12131321333331 - 2¹⁵ = 12131321300563 is a prime.

It is a super-2 number, since 2×12131321333331² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12131321333333) 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, 2021886888886 + ... + 2021886888891.

It is an arithmetic number, because the mean of its divisors is an integer number (4043773777778).

Almost surely, 2^{12131321333331} is an apocalyptic number.

12131321333331 is a deficient number, since it is larger than the sum of its proper divisors (4043773777781).

12131321333331 is an equidigital number, since it uses as much as digits as its factorization.

12131321333331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4043773777780.

The product of its digits is 8748, while the sum is 30.

Adding to 12131321333331 its reverse (13333312313121), we get a palindrome (25464633646452).

The spelling of 12131321333331 in words is "twelve trillion, one hundred thirty-one billion, three hundred twenty-one million, three hundred thirty-three thousand, three hundred thirty-one".