12212222211200 has 384 divisors, whose sum is σ = 33283625336640. Its totient is φ = 4390594560000.

The previous prime is 12212222211197. The next prime is 12212222211239. The reversal of 12212222211200 is 211222221221.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 3032583587 + ... + 3032587613.

Almost surely, 2^{12212222211200} is an apocalyptic number.

12212222211200 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 12212222211200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16641812668320).

12212222211200 is an abundant number, since it is smaller than the sum of its proper divisors (21071403125440).

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

12212222211200 is a wasteful number, since it uses less digits than its factorization.

12212222211200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5016 (or 4999 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 12212222211200 its reverse (211222221221), we get a palindrome (12423444432421).

It can be divided in two parts, 122122 and 22211200, that added together give a palindrome (22333322).

The spelling of 12212222211200 in words is "twelve trillion, two hundred twelve billion, two hundred twenty-two million, two hundred eleven thousand, two hundred".