12420044243420 has 96 divisors (see below), whose sum is σ = 28649731803840. Its totient is φ = 4485213757440.

The previous prime is 12420044243393. The next prime is 12420044243459. The reversal of 12420044243420 is 2434244002421.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65150882 + ... + 65341238.

It is an arithmetic number, because the mean of its divisors is an integer number (298434706290).

Almost surely, 2^{12420044243420} is an apocalyptic number.

12420044243420 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 12420044243420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14324865901920).

12420044243420 is an abundant number, since it is smaller than the sum of its proper divisors (16229687560420).

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

12420044243420 is a wasteful number, since it uses less digits than its factorization.

12420044243420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192423 (or 192421 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 32.

Adding to 12420044243420 its reverse (2434244002421), we get a palindrome (14854288245841).

The spelling of 12420044243420 in words is "twelve trillion, four hundred twenty billion, forty-four million, two hundred forty-three thousand, four hundred twenty".