12051421200 has 360 divisors, whose sum is σ = 51474358208. Its totient is φ = 2542648320.

The previous prime is 12051421189. The next prime is 12051421211. The reversal of 12051421200 is 212415021.

It is an interprime number because it is at equal distance from previous prime (12051421189) and next prime (12051421211).

It is a tau number, because it is divible by the number of its divisors (360).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 309207 + ... + 345993.

Almost surely, 2^12051421200 is an apocalyptic number.

12051421200 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 12051421200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25737179104).

12051421200 is an abundant number, since it is smaller than the sum of its proper divisors (39422937008).

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

12051421200 is a wasteful number, since it uses less digits than its factorization.

12051421200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36831 (or 36817 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

Adding to 12051421200 its reverse (212415021), we get a palindrome (12263836221).

The spelling of 12051421200 in words is "twelve billion, fifty-one million, four hundred twenty-one thousand, two hundred".