12401220400 has 30 divisors (see below), whose sum is σ = 29793932972. Its totient is φ = 4960488000.

The previous prime is 12401220389. The next prime is 12401220413. The reversal of 12401220400 is 402210421.

12401220400 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (16).

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 5 ways as a sum of consecutive naturals, for example, 15501126 + ... + 15501925.

Almost surely, 2^12401220400 is an apocalyptic number.

12401220400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12401220400 is an abundant number, since it is smaller than the sum of its proper divisors (17392712572).

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

12401220400 is a wasteful number, since it uses less digits than its factorization.

12401220400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31003069 (or 31003058 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 12401220400 its reverse (402210421), we get a palindrome (12803430821).

The spelling of 12401220400 in words is "twelve billion, four hundred one million, two hundred twenty thousand, four hundred".