2221222211 has 8 divisors (see below), whose sum is σ = 2392670784. Its totient is φ = 2049857280.

The previous prime is 2221222207. The next prime is 2221222229. The reversal of 2221222211 is 1122221222.

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 2221222211 - 2² = 2221222207 is a prime.

It is a super-2 number, since 2×2221222211² = 9867656221279457042, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2221222211.

It is not an unprimeable number, because it can be changed into a prime (2221222811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41075 + ... + 78291.

It is an arithmetic number, because the mean of its divisors is an integer number (299083848).

Almost surely, 2^2221222211 is an apocalyptic number.

2221222211 is a deficient number, since it is larger than the sum of its proper divisors (171448573).

2221222211 is a wasteful number, since it uses less digits than its factorization.

2221222211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41821.

The product of its digits is 128, while the sum is 17.

The square root of 2221222211 is about 47129.8441648177. The cubic root of 2221222211 is about 1304.7601054414.

Adding to 2221222211 its reverse (1122221222), we get a palindrome (3343443433).

The spelling of 2221222211 in words is "two billion, two hundred twenty-one million, two hundred twenty-two thousand, two hundred eleven".