1200421404400 has 30 divisors (see below), whose sum is σ = 2884012425032. Its totient is φ = 480168561600.

The previous prime is 1200421404389. The next prime is 1200421404409. The reversal of 1200421404400 is 44041240021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200421404409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1500526356 + ... + 1500527155.

Almost surely, 2^{1200421404400} is an apocalyptic number.

1200421404400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200421404400 is an abundant number, since it is smaller than the sum of its proper divisors (1683591020632).

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

1200421404400 is a wasteful number, since it uses less digits than its factorization.

1200421404400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3001053529 (or 3001053518 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 1200421404400 its reverse (44041240021), we get a palindrome (1244462644421).

The spelling of 1200421404400 in words is "one trillion, two hundred billion, four hundred twenty-one million, four hundred four thousand, four hundred".