12001221200 has 60 divisors (see below), whose sum is σ = 29005747680. Its totient is φ = 4771716480.

The previous prime is 12001221187. The next prime is 12001221217. The reversal of 12001221200 is 212210021.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23030 + ... + 156629.

It is an arithmetic number, because the mean of its divisors is an integer number (483429128).

Almost surely, 2^12001221200 is an apocalyptic number.

12001221200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12001221200 is an abundant number, since it is smaller than the sum of its proper divisors (17004526480).

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

12001221200 is a wasteful number, since it uses less digits than its factorization.

12001221200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179844 (or 179833 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 12001221200 its reverse (212210021), we get a palindrome (12213431221).

The spelling of 12001221200 in words is "twelve billion, one million, two hundred twenty-one thousand, two hundred".