12421042400 has 144 divisors (see below), whose sum is σ = 32728374000. Its totient is φ = 4575989760.

The previous prime is 12421042399. The next prime is 12421042411. The reversal of 12421042400 is 424012421.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 5916551 + ... + 5918649.

It is an arithmetic number, because the mean of its divisors is an integer number (227280375).

Almost surely, 2^12421042400 is an apocalyptic number.

12421042400 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 12421042400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16364187000).

12421042400 is an abundant number, since it is smaller than the sum of its proper divisors (20307331600).

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

12421042400 is a wasteful number, since it uses less digits than its factorization.

12421042400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2701 (or 2688 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 12421042400 its reverse (424012421), we get a palindrome (12845054821).

The spelling of 12421042400 in words is "twelve billion, four hundred twenty-one million, forty-two thousand, four hundred".