12001220000 has 240 divisors, whose sum is σ = 36814865472. Its totient is φ = 3740160000.

The previous prime is 12001219987. The next prime is 12001220027. The reversal of 12001220000 is 2210021.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a self number, because there is not a number n which added to its sum of digits gives 12001220000.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1536104 + ... + 1543896.

Almost surely, 2^12001220000 is an apocalyptic number.

12001220000 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 12001220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18407432736).

12001220000 is an abundant number, since it is smaller than the sum of its proper divisors (24813645472).

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

12001220000 is an equidigital number, since it uses as much as digits as its factorization.

12001220000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7841 (or 7818 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

Adding to 12001220000 its reverse (2210021), we get a palindrome (12003430021).

The spelling of 12001220000 in words is "twelve billion, one million, two hundred twenty thousand".