12031223231 has 8 divisors (see below), whose sum is σ = 12322430400. Its totient is φ = 11741483808.

The previous prime is 12031223209. The next prime is 12031223233. The reversal of 12031223231 is 13232213021.

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

It is a cyclic number.

It is not a de Polignac number, because 12031223231 - 2²⁶ = 11964114367 is a prime.

It is a super-2 number, since 2×12031223231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12031223233) 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, 350336 + ... + 383141.

It is an arithmetic number, because the mean of its divisors is an integer number (1540303800).

Almost surely, 2^12031223231 is an apocalyptic number.

12031223231 is a deficient number, since it is larger than the sum of its proper divisors (291207169).

12031223231 is an equidigital number, since it uses as much as digits as its factorization.

12031223231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733873.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 12031223231 its reverse (13232213021), we get a palindrome (25263436252).

The spelling of 12031223231 in words is "twelve billion, thirty-one million, two hundred twenty-three thousand, two hundred thirty-one".