22221222211 has 8 divisors (see below), whose sum is σ = 22568827904. Its totient is φ = 21874085640.

The previous prime is 22221222203. The next prime is 22221222217. The reversal of 22221222211 is 11222212222.

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 22221222211 - 2³ = 22221222203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22221222217) 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, 21195 + ... + 211876.

It is an arithmetic number, because the mean of its divisors is an integer number (2821103488).

Almost surely, 2^22221222211 is an apocalyptic number.

22221222211 is a deficient number, since it is larger than the sum of its proper divisors (347605693).

22221222211 is a wasteful number, since it uses less digits than its factorization.

22221222211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234561.

The product of its digits is 256, while the sum is 19.

Adding to 22221222211 its reverse (11222212222), we get a palindrome (33443434433).

It can be divided in two parts, 222212222 and 11, that multiplied together give a palindrome (2444334442).

The spelling of 22221222211 in words is "twenty-two billion, two hundred twenty-one million, two hundred twenty-two thousand, two hundred eleven".