2222102221 has 4 divisors (see below), whose sum is σ = 2264028732. Its totient is φ = 2180175712.

The previous prime is 2222102209. The next prime is 2222102321. The reversal of 2222102221 is 1222012222.

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 1596402025 + 625700196 = 39955^2 + 25014^2 .

It is a cyclic number.

It is not a de Polignac number, because 2222102221 - 2¹⁵ = 2222069453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2222102195 and 2222102204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2222102021) 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, 20963176 + ... + 20963281.

It is an arithmetic number, because the mean of its divisors is an integer number (566007183).

Almost surely, 2^2222102221 is an apocalyptic number.

It is an amenable number.

2222102221 is a deficient number, since it is larger than the sum of its proper divisors (41926511).

2222102221 is an equidigital number, since it uses as much as digits as its factorization.

2222102221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41926510.

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

The square root of 2222102221 is about 47139.1792567499. The cubic root of 2222102221 is about 1304.9323905217.

Adding to 2222102221 its reverse (1222012222), we get a palindrome (3444114443).

The spelling of 2222102221 in words is "two billion, two hundred twenty-two million, one hundred two thousand, two hundred twenty-one".