12131321331 has 8 divisors (see below), whose sum is σ = 16175693200. Its totient is φ = 8087248512.

The previous prime is 12131321303. The next prime is 12131321339. The reversal of 12131321331 is 13312313121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12131321331 - 2¹⁹ = 12130797043 is a prime.

It is a super-2 number, since 2×12131321331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12131321298 and 12131321307.

It is not an unprimeable number, because it can be changed into a prime (12131321339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49311 + ... + 163383.

It is an arithmetic number, because the mean of its divisors is an integer number (2021961650).

Almost surely, 2^12131321331 is an apocalyptic number.

12131321331 is a deficient number, since it is larger than the sum of its proper divisors (4044371869).

12131321331 is a wasteful number, since it uses less digits than its factorization.

12131321331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149525.

The product of its digits is 324, while the sum is 21.

Adding to 12131321331 its reverse (13312313121), we get a palindrome (25443634452).

The spelling of 12131321331 in words is "twelve billion, one hundred thirty-one million, three hundred twenty-one thousand, three hundred thirty-one".