12311231223331 has 4 divisors (see below), whose sum is σ = 12311238316432. Its totient is φ = 12311224130232.

The previous prime is 12311231223301. The next prime is 12311231223353. The reversal of 12311231223331 is 13332213211321.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12311231223331 - 2¹⁵ = 12311231190563 is a prime.

It is a super-2 number, since 2×12311231223331² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12311231223331.

It is not an unprimeable number, because it can be changed into a prime (12311231223301) 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, 998506 + ... + 5061568.

It is an arithmetic number, because the mean of its divisors is an integer number (3077809579108).

Almost surely, 2^{12311231223331} is an apocalyptic number.

12311231223331 is a deficient number, since it is larger than the sum of its proper divisors (7093101).

12311231223331 is an equidigital number, since it uses as much as digits as its factorization.

12311231223331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7093100.

The product of its digits is 3888, while the sum is 28.

Adding to 12311231223331 its reverse (13332213211321), we get a palindrome (25643444434652).

The spelling of 12311231223331 in words is "twelve trillion, three hundred eleven billion, two hundred thirty-one million, two hundred twenty-three thousand, three hundred thirty-one".