12231320031 has 40 divisors (see below), whose sum is σ = 21235674240. Its totient is φ = 6870843792.

The previous prime is 12231319993. The next prime is 12231320033. The reversal of 12231320031 is 13002313221.

12231320031 is a `hidden beast` number, since 122 + 313 + 200 + 31 = 666.

It is not a de Polignac number, because 12231320031 - 2⁶ = 12231319967 is a prime.

It is a super-2 number, since 2×12231320031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12231319986 and 12231320013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12231320033) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 149361 + ... + 216266.

It is an arithmetic number, because the mean of its divisors is an integer number (530891856).

Almost surely, 2^12231320031 is an apocalyptic number.

12231320031 is a deficient number, since it is larger than the sum of its proper divisors (9004354209).

12231320031 is an equidigital number, since it uses as much as digits as its factorization.

12231320031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365705 (or 365696 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 12231320031 its reverse (13002313221), we get a palindrome (25233633252).

The spelling of 12231320031 in words is "twelve billion, two hundred thirty-one million, three hundred twenty thousand, thirty-one".