2200021122221 has 16 divisors (see below), whose sum is σ = 2374437536688. Its totient is φ = 2026347840000.

The previous prime is 2200021122217. The next prime is 2200021122263. The reversal of 2200021122221 is 1222211200022.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 238309948900 + 1961711173321 = 488170^2 + 1400611^2 .

It is a cyclic number.

It is not a de Polignac number, because 2200021122221 - 2² = 2200021122217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2200021122221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2200021122821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21307721 + ... + 21410721.

It is an arithmetic number, because the mean of its divisors is an integer number (148402346043).

Almost surely, 2^{2200021122221} is an apocalyptic number.

It is an amenable number.

2200021122221 is a deficient number, since it is larger than the sum of its proper divisors (174416414467).

2200021122221 is a wasteful number, since it uses less digits than its factorization.

2200021122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106592.

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

Adding to 2200021122221 its reverse (1222211200022), we get a palindrome (3422232322243).

The spelling of 2200021122221 in words is "two trillion, two hundred billion, twenty-one million, one hundred twenty-two thousand, two hundred twenty-one".