12312311331 has 4 divisors (see below), whose sum is σ = 16416415112. Its totient is φ = 8208207552.

The previous prime is 12312311329. The next prime is 12312311359. The reversal of 12312311331 is 13311321321.

It is a happy number.

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

It is not a de Polignac number, because 12312311331 - 2¹ = 12312311329 is a prime.

It is a super-2 number, since 2×12312311331² (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 = 12312311298 and 12312311307.

It is not an unprimeable number, because it can be changed into a prime (12312311371) 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, 2052051886 + ... + 2052051891.

It is an arithmetic number, because the mean of its divisors is an integer number (4104103778).

Almost surely, 2^12312311331 is an apocalyptic number.

12312311331 is a deficient number, since it is larger than the sum of its proper divisors (4104103781).

12312311331 is an equidigital number, since it uses as much as digits as its factorization.

12312311331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4104103780.

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

Adding to 12312311331 its reverse (13311321321), we get a palindrome (25623632652).

The spelling of 12312311331 in words is "twelve billion, three hundred twelve million, three hundred eleven thousand, three hundred thirty-one".