2222100221 has 4 divisors (see below), whose sum is σ = 2424109344. Its totient is φ = 2020091100.

The previous prime is 2222100193. The next prime is 2222100233. The reversal of 2222100221 is 1220012222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2222100221 - 2¹⁰ = 2222099197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2222100196 and 2222100205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2222100241) 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 3 ways as a sum of consecutive naturals, for example, 101004545 + ... + 101004566.

It is an arithmetic number, because the mean of its divisors is an integer number (606027336).

Almost surely, 2^2222100221 is an apocalyptic number.

It is an amenable number.

2222100221 is a deficient number, since it is larger than the sum of its proper divisors (202009123).

2222100221 is a wasteful number, since it uses less digits than its factorization.

2222100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202009122.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 2222100221 is about 47139.1580429689. The cubic root of 2222100221 is about 1304.9319990207.

Adding to 2222100221 its reverse (1220012222), we get a palindrome (3442112443).

The spelling of 2222100221 in words is "two billion, two hundred twenty-two million, one hundred thousand, two hundred twenty-one".