12021011200 has 486 divisors, whose sum is σ = 35319283692. Its totient is φ = 4044902400.

The previous prime is 12021011153. The next prime is 12021011231. The reversal of 12021011200 is 211012021.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 279558379 + ... + 279558421.

Almost surely, 2^12021011200 is an apocalyptic number.

12021011200 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 12021011200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17659641846).

12021011200 is an abundant number, since it is smaller than the sum of its proper divisors (23298272492).

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

12021011200 is a wasteful number, since it uses less digits than its factorization.

12021011200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129 (or 80 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 12021011200 its reverse (211012021), we get a palindrome (12232023221).

The spelling of 12021011200 in words is "twelve billion, twenty-one million, eleven thousand, two hundred".