12021211200 has 336 divisors, whose sum is σ = 40932201600. Its totient is φ = 3086254080.

The previous prime is 12021211177. The next prime is 12021211219. The reversal of 12021211200 is 211212021.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20068501 + ... + 20069099.

Almost surely, 2^12021211200 is an apocalyptic number.

12021211200 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 12021211200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20466100800).

12021211200 is an abundant number, since it is smaller than the sum of its proper divisors (28910990400).

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

12021211200 is a wasteful number, since it uses less digits than its factorization.

12021211200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774 (or 759 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 12021211200 its reverse (211212021), we get a palindrome (12232423221).

The spelling of 12021211200 in words is "twelve billion, twenty-one million, two hundred eleven thousand, two hundred".