12320302331 has 4 divisors (see below), whose sum is σ = 12323793072. Its totient is φ = 12316811592.

The previous prime is 12320302289. The next prime is 12320302361. The reversal of 12320302331 is 13320302321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13320302321 = 2617 ⋅5089913.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12320302331 is a prime.

It is a super-2 number, since 2×12320302331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12320302361) 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, 1740071 + ... + 1747136.

It is an arithmetic number, because the mean of its divisors is an integer number (3080948268).

Almost surely, 2^12320302331 is an apocalyptic number.

12320302331 is a deficient number, since it is larger than the sum of its proper divisors (3490741).

12320302331 is an equidigital number, since it uses as much as digits as its factorization.

12320302331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3490740.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 12320302331 its reverse (13320302321), we get a palindrome (25640604652).

The spelling of 12320302331 in words is "twelve billion, three hundred twenty million, three hundred two thousand, three hundred thirty-one".