12031311223 has 4 divisors (see below), whose sum is σ = 12031767328. Its totient is φ = 12030855120.

The previous prime is 12031311209. The next prime is 12031311239. The reversal of 12031311223 is 32211313021.

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

It is a cyclic number.

It is not a de Polignac number, because 12031311223 - 2²⁵ = 11997756791 is a prime.

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 12031311223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12031311263) 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, 185886 + ... + 242107.

It is an arithmetic number, because the mean of its divisors is an integer number (3007941832).

Almost surely, 2^12031311223 is an apocalyptic number.

12031311223 is a deficient number, since it is larger than the sum of its proper divisors (456105).

12031311223 is an equidigital number, since it uses as much as digits as its factorization.

12031311223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456104.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 12031311223 its reverse (32211313021), we get a palindrome (44242624244).

The spelling of 12031311223 in words is "twelve billion, thirty-one million, three hundred eleven thousand, two hundred twenty-three".