12421306400 has 72 divisors (see below), whose sum is σ = 31641974784. Its totient is φ = 4752492800.

The previous prime is 12421306399. The next prime is 12421306427. The reversal of 12421306400 is 460312421.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 319136 + ... + 355935.

It is an arithmetic number, because the mean of its divisors is an integer number (439471872).

Almost surely, 2^12421306400 is an apocalyptic number.

12421306400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12421306400 is an abundant number, since it is smaller than the sum of its proper divisors (19220668384).

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

12421306400 is a wasteful number, since it uses less digits than its factorization.

12421306400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675114 (or 675101 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 12421306400 its reverse (460312421), we get a palindrome (12881618821).

The spelling of 12421306400 in words is "twelve billion, four hundred twenty-one million, three hundred six thousand, four hundred".