2201222221 has 16 divisors (see below), whose sum is σ = 2444367168. Its totient is φ = 1965427200.

The previous prime is 2201222207. The next prime is 2201222251. The reversal of 2201222221 is 1222221022.

It is not a de Polignac number, because 2201222221 - 2²¹ = 2199125069 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2201222195 and 2201222204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2201222201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 255931 + ... + 264391.

It is an arithmetic number, because the mean of its divisors is an integer number (152772948).

Almost surely, 2^2201222221 is an apocalyptic number.

It is an amenable number.

2201222221 is a deficient number, since it is larger than the sum of its proper divisors (243144947).

2201222221 is a wasteful number, since it uses less digits than its factorization.

2201222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8892.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 2201222221 is about 46917.1847088037. The cubic root of 2201222221 is about 1300.8322522904.

Adding to 2201222221 its reverse (1222221022), we get a palindrome (3423443243).

It can be divided in two parts, 2201 and 222221, that added together give a palindrome (224422).

The spelling of 2201222221 in words is "two billion, two hundred one million, two hundred twenty-two thousand, two hundred twenty-one".