12012221200 has 60 divisors (see below), whose sum is σ = 32982135040. Its totient is φ = 4118474880.

The previous prime is 12012221197. The next prime is 12012221227. The reversal of 12012221200 is 212221021.

It is a happy 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, 2142240 + ... + 2147839.

Almost surely, 2^12012221200 is an apocalyptic number.

12012221200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12012221200 is an abundant number, since it is smaller than the sum of its proper divisors (20969913840).

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

12012221200 is a wasteful number, since it uses less digits than its factorization.

12012221200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4290104 (or 4290093 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 12012221200 its reverse (212221021), we get a palindrome (12224442221).

The spelling of 12012221200 in words is "twelve billion, twelve million, two hundred twenty-one thousand, two hundred".