2200022221 has 4 divisors (see below), whose sum is σ = 2204836732. Its totient is φ = 2195207712.

The previous prime is 2200022213. The next prime is 2200022261. The reversal of 2200022221 is 1222200022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1179922500 + 1020099721 = 34350^2 + 31939^2 .

It is a cyclic number.

It is not a de Polignac number, because 2200022221 - 2³ = 2200022213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2200022261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2406570 + ... + 2407483.

It is an arithmetic number, because the mean of its divisors is an integer number (551209183).

Almost surely, 2^2200022221 is an apocalyptic number.

It is an amenable number.

2200022221 is a deficient number, since it is larger than the sum of its proper divisors (4814511).

2200022221 is an equidigital number, since it uses as much as digits as its factorization.

2200022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4814510.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 2200022221 is about 46904.3944742921. The cubic root of 2200022221 is about 1300.5958256916.

Adding to 2200022221 its reverse (1222200022), we get a palindrome (3422222243).

The spelling of 2200022221 in words is "two billion, two hundred million, twenty-two thousand, two hundred twenty-one".