2222111221 has 8 divisors (see below), whose sum is σ = 2424945600. Its totient is φ = 2019414240.

The previous prime is 2222111219. The next prime is 2222111239. The reversal of 2222111221 is 1221112222.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2222111221 - 2¹ = 2222111219 is a prime.

It is a super-2 number, since 2×2222111221² = 9875556556988221682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2222111195 and 2222111204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2222111251) 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 7 ways as a sum of consecutive naturals, for example, 1065 + ... + 66673.

It is an arithmetic number, because the mean of its divisors is an integer number (303118200).

Almost surely, 2^2222111221 is an apocalyptic number.

It is an amenable number.

2222111221 is a deficient number, since it is larger than the sum of its proper divisors (202834379).

2222111221 is a wasteful number, since it uses less digits than its factorization.

2222111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68699.

The product of its digits is 64, while the sum is 16.

The square root of 2222111221 is about 47139.2747186462. The cubic root of 2222111221 is about 1304.9341522732.

Adding to 2222111221 its reverse (1221112222), we get a palindrome (3443223443).

The spelling of 2222111221 in words is "two billion, two hundred twenty-two million, one hundred eleven thousand, two hundred twenty-one".