12420331224 has 64 divisors (see below), whose sum is σ = 35745753600. Its totient is φ = 3522756864.

The previous prime is 12420331181. The next prime is 12420331229. The reversal of 12420331224 is 42213302421.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 12420331194 and 12420331203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12420331229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 246804 + ... + 292835.

It is an arithmetic number, because the mean of its divisors is an integer number (558527400).

Almost surely, 2^12420331224 is an apocalyptic number.

12420331224 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

12420331224 is an abundant number, since it is smaller than the sum of its proper divisors (23325422376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12420331224 is a wasteful number, since it uses less digits than its factorization.

12420331224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539792 (or 539788 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 12420331224 its reverse (42213302421), we get a palindrome (54633633645).

The spelling of 12420331224 in words is "twelve billion, four hundred twenty million, three hundred thirty-one thousand, two hundred twenty-four".