12421403344 has 40 divisors (see below), whose sum is σ = 27624700160. Its totient is φ = 5300201088.

The previous prime is 12421403339. The next prime is 12421403359. The reversal of 12421403344 is 44330412421.

12421403344 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×12421403344² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216504 + ... + 267799.

It is an arithmetic number, because the mean of its divisors is an integer number (690617504).

Almost surely, 2^12421403344 is an apocalyptic number.

12421403344 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

12421403344 is an abundant number, since it is smaller than the sum of its proper divisors (15203296816).

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

12421403344 is a wasteful number, since it uses less digits than its factorization.

12421403344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484547 (or 484541 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 12421403344 its reverse (44330412421), we get a palindrome (56751815765).

The spelling of 12421403344 in words is "twelve billion, four hundred twenty-one million, four hundred three thousand, three hundred forty-four".