12002221200 has 120 divisors (see below), whose sum is σ = 38553290368. Its totient is φ = 3191754240.

The previous prime is 12002221177. The next prime is 12002221201. The reversal of 12002221200 is 212220021.

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

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (12002221201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 426774 + ... + 454026.

Almost surely, 2^12002221200 is an apocalyptic number.

12002221200 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 12002221200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19276645184).

12002221200 is an abundant number, since it is smaller than the sum of its proper divisors (26551069168).

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

12002221200 is a wasteful number, since it uses less digits than its factorization.

12002221200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27641 (or 27630 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 12002221200 its reverse (212220021), we get a palindrome (12214441221).

The spelling of 12002221200 in words is "twelve billion, two million, two hundred twenty-one thousand, two hundred".