222001202220 has 144 divisors (see below), whose sum is σ = 727130960640. Its totient is φ = 50459531136.

The previous prime is 222001202179. The next prime is 222001202243. The reversal of 222001202220 is 22202100222.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 222001202220.

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, 315337 + ... + 737183.

It is an arithmetic number, because the mean of its divisors is an integer number (5049520560).

Almost surely, 2^222001202220 is an apocalyptic number.

222001202220 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 222001202220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (363565480320).

222001202220 is an abundant number, since it is smaller than the sum of its proper divisors (505129758420).

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

222001202220 is a wasteful number, since it uses less digits than its factorization.

222001202220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422052 (or 422043 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

Adding to 222001202220 its reverse (22202100222), we get a palindrome (244203302442).

The spelling of 222001202220 in words is "two hundred twenty-two billion, one million, two hundred two thousand, two hundred twenty".