12331201220 has 24 divisors (see below), whose sum is σ = 27887486424. Its totient is φ = 4553058816.

The previous prime is 12331201189. The next prime is 12331201237. The reversal of 12331201220 is 2210213321.

It can be written as a sum of positive squares in 4 ways, for example, as 720707716 + 11610493504 = 26846^2 + 107752^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23713589 + ... + 23714108.

It is an arithmetic number, because the mean of its divisors is an integer number (1161978601).

Almost surely, 2^12331201220 is an apocalyptic number.

12331201220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12331201220 is an abundant number, since it is smaller than the sum of its proper divisors (15556285204).

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

12331201220 is a wasteful number, since it uses less digits than its factorization.

12331201220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47427719 (or 47427717 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 12331201220 its reverse (2210213321), we get a palindrome (14541414541).

The spelling of 12331201220 in words is "twelve billion, three hundred thirty-one million, two hundred one thousand, two hundred twenty".