22221112211 has 4 divisors (see below), whose sum is σ = 22293493992. Its totient is φ = 22148730432.

The previous prime is 22221112157. The next prime is 22221112231. The reversal of 22221112211 is 11221112222.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22221112211 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 22221112211.

It is not an unprimeable number, because it can be changed into a prime (22221112231) 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, 36190430 + ... + 36191043.

It is an arithmetic number, because the mean of its divisors is an integer number (5573373498).

Almost surely, 2^22221112211 is an apocalyptic number.

22221112211 is a deficient number, since it is larger than the sum of its proper divisors (72381781).

22221112211 is an equidigital number, since it uses as much as digits as its factorization.

22221112211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72381780.

The product of its digits is 64, while the sum is 17.

Adding to 22221112211 its reverse (11221112222), we get a palindrome (33442224433).

The spelling of 22221112211 in words is "twenty-two billion, two hundred twenty-one million, one hundred twelve thousand, two hundred eleven".