12312404434220 has 96 divisors (see below), whose sum is σ = 28485933396480. Its totient is φ = 4433107927040.

The previous prime is 12312404434159. The next prime is 12312404434261. The reversal of 12312404434220 is 2243440421321.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8790191 + ... + 10094169.

It is an arithmetic number, because the mean of its divisors is an integer number (296728472880).

Almost surely, 2^{12312404434220} is an apocalyptic number.

12312404434220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12312404434220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14242966698240).

12312404434220 is an abundant number, since it is smaller than the sum of its proper divisors (16173528962260).

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

12312404434220 is a wasteful number, since it uses less digits than its factorization.

12312404434220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1304423 (or 1304421 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 12312404434220 its reverse (2243440421321), we get a palindrome (14555844855541).

The spelling of 12312404434220 in words is "twelve trillion, three hundred twelve billion, four hundred four million, four hundred thirty-four thousand, two hundred twenty".