222120001221200 has 120 divisors (see below), whose sum is σ = 539952641712000. Its totient is φ = 87798697620480.

The previous prime is 222120001221191. The next prime is 222120001221203. The reversal of 222120001221200 is 2122100021222.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222120001221203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59528201 + ... + 63149399.

It is an arithmetic number, because the mean of its divisors is an integer number (4499605347600).

Almost surely, 2^{222120001221200} is an apocalyptic number.

222120001221200 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 222120001221200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (269976320856000).

222120001221200 is an abundant number, since it is smaller than the sum of its proper divisors (317832640490800).

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

222120001221200 is a wasteful number, since it uses less digits than its factorization.

222120001221200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3623029 (or 3623018 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 222120001221200 its reverse (2122100021222), we get a palindrome (224242101242422).

The spelling of 222120001221200 in words is "two hundred twenty-two trillion, one hundred twenty billion, one million, two hundred twenty-one thousand, two hundred".