12312223231 has 48 divisors (see below), whose sum is σ = 16348147200. Its totient is φ = 9051324480.

The previous prime is 12312223223. The next prime is 12312223241. The reversal of 12312223231 is 13232221321.

It is not a de Polignac number, because 12312223231 - 2³ = 12312223223 is a prime.

It is a super-2 number, since 2×12312223231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12312223211) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4231005 + ... + 4233913.

It is an arithmetic number, because the mean of its divisors is an integer number (340586400).

Almost surely, 2^12312223231 is an apocalyptic number.

12312223231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12312223231 is a deficient number, since it is larger than the sum of its proper divisors (4035923969).

12312223231 is a wasteful number, since it uses less digits than its factorization.

12312223231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3220 (or 3209 counting only the distinct ones).

The product of its digits is 864, while the sum is 22.

Adding to 12312223231 its reverse (13232221321), we get a palindrome (25544444552).

The spelling of 12312223231 in words is "twelve billion, three hundred twelve million, two hundred twenty-three thousand, two hundred thirty-one".