222221121021200 has 480 divisors, whose sum is σ = 655530543360000. Its totient is φ = 72163151424000.

The previous prime is 222221121021191. The next prime is 222221121021299. The reversal of 222221121021200 is 2120121122222.

222221121021200 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 95 ways as a sum of consecutive naturals, for example, 16034419871 + ... + 16034433729.

It is an arithmetic number, because the mean of its divisors is an integer number (1365688632000).

Almost surely, 2^{222221121021200} is an apocalyptic number.

222221121021200 is a gapful number since it is divisible by the number (20) 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 222221121021200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (327765271680000).

222221121021200 is an abundant number, since it is smaller than the sum of its proper divisors (433309422338800).

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

222221121021200 is a wasteful number, since it uses less digits than its factorization.

222221121021200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20068 (or 20043 counting only the distinct ones).

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

Adding to 222221121021200 its reverse (2120121122222), we get a palindrome (224341242143422).

The spelling of 222221121021200 in words is "two hundred twenty-two trillion, two hundred twenty-one billion, one hundred twenty-one million, twenty-one thousand, two hundred".