22212112211 has 4 divisors (see below), whose sum is σ = 22212964752. Its totient is φ = 22211259672.

The previous prime is 22212112189. The next prime is 22212112213. The reversal of 22212112211 is 11221121222.

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-22212112211 is a prime.

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 22212112211.

It is not an unprimeable number, because it can be changed into a prime (22212112213) 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, 385916 + ... + 439721.

It is an arithmetic number, because the mean of its divisors is an integer number (5553241188).

Almost surely, 2^22212112211 is an apocalyptic number.

22212112211 is a deficient number, since it is larger than the sum of its proper divisors (852541).

22212112211 is an equidigital number, since it uses as much as digits as its factorization.

22212112211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852540.

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

Adding to 22212112211 its reverse (11221121222), we get a palindrome (33433233433).

The spelling of 22212112211 in words is "twenty-two billion, two hundred twelve million, one hundred twelve thousand, two hundred eleven".