12045421200 has 120 divisors (see below), whose sum is σ = 38983664608. Its totient is φ = 3178967040.

The previous prime is 12045421183. The next prime is 12045421229. The reversal of 12045421200 is 212454021.

12045421200 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (120).

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 23 ways as a sum of consecutive naturals, for example, 64659 + ... + 168141.

Almost surely, 2^12045421200 is an apocalyptic number.

12045421200 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 12045421200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19491832304).

12045421200 is an abundant number, since it is smaller than the sum of its proper divisors (26938243408).

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

12045421200 is a wasteful number, since it uses less digits than its factorization.

12045421200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103601 (or 103590 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

Adding to 12045421200 its reverse (212454021), we get a palindrome (12257875221).

The spelling of 12045421200 in words is "twelve billion, forty-five million, four hundred twenty-one thousand, two hundred".