12420032231 has 12 divisors (see below), whose sum is σ = 12857197176. Its totient is φ = 11997290160.

The previous prime is 12420032203. The next prime is 12420032291. The reversal of 12420032231 is 13223002421.

It is not a de Polignac number, because 12420032231 - 2²² = 12415837927 is a prime.

It is a super-2 number, since 2×12420032231² (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 (12420032291) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 523676 + ... + 546878.

It is an arithmetic number, because the mean of its divisors is an integer number (1071433098).

Almost surely, 2^12420032231 is an apocalyptic number.

12420032231 is a deficient number, since it is larger than the sum of its proper divisors (437164945).

12420032231 is an equidigital number, since it uses as much as digits as its factorization.

12420032231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23822 (or 23791 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 12420032231 its reverse (13223002421), we get a palindrome (25643034652).

The spelling of 12420032231 in words is "twelve billion, four hundred twenty million, thirty-two thousand, two hundred thirty-one".