12312033220 has 24 divisors (see below), whose sum is σ = 25859444184. Its totient is φ = 4924018176.

The previous prime is 12312033133. The next prime is 12312033221. The reversal of 12312033220 is 2233021321.

It can be written as a sum of positive squares in 4 ways, for example, as 86750596 + 12225282624 = 9314^2 + 110568^2 .

It is not an unprimeable number, because it can be changed into a prime (12312033221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86364 + ... + 179116.

It is an arithmetic number, because the mean of its divisors is an integer number (1077476841).

Almost surely, 2^12312033220 is an apocalyptic number.

12312033220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12312033220 is an abundant number, since it is smaller than the sum of its proper divisors (13547410964).

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

12312033220 is a wasteful number, since it uses less digits than its factorization.

12312033220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99399 (or 99397 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 12312033220 its reverse (2233021321), we get a palindrome (14545054541).

The spelling of 12312033220 in words is "twelve billion, three hundred twelve million, thirty-three thousand, two hundred twenty".