12213321221200 has 240 divisors, whose sum is σ = 32632884576000. Its totient is φ = 4355541964800.

The previous prime is 12213321221191. The next prime is 12213321221203. The reversal of 12213321221200 is 212212331221.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12213321221203) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 51674494 + ... + 51910306.

It is an arithmetic number, because the mean of its divisors is an integer number (135970352400).

Almost surely, 2^{12213321221200} is an apocalyptic number.

12213321221200 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 12213321221200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16316442288000).

12213321221200 is an abundant number, since it is smaller than the sum of its proper divisors (20419563354800).

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

12213321221200 is a wasteful number, since it uses less digits than its factorization.

12213321221200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236070 (or 236059 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 12213321221200 its reverse (212212331221), we get a palindrome (12425533552421).

The spelling of 12213321221200 in words is "twelve trillion, two hundred thirteen billion, three hundred twenty-one million, two hundred twenty-one thousand, two hundred".