22212211 has 8 divisors (see below), whose sum is σ = 25691904. Its totient is φ = 18809160.

The previous prime is 22212199. The next prime is 22212233. The reversal of 22212211 is 11221222.

It is a happy number.

22212211 is nontrivially palindromic in base 12.

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 22212211 - 2¹¹ = 22210163 is a prime.

It is a super-4 number, since 4×22212211⁴ (a number of 30 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22212191 and 22212200.

It is not an unprimeable number, because it can be changed into a prime (22212271) 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, 18535 + ... + 19696.

It is an arithmetic number, because the mean of its divisors is an integer number (3211488).

Almost surely, 2^22212211 is an apocalyptic number.

22212211 is a deficient number, since it is larger than the sum of its proper divisors (3479693).

22212211 is an equidigital number, since it uses as much as digits as its factorization.

22212211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38321.

The product of its digits is 32, while the sum is 13.

The square root of 22212211 is about 4712.9832378229. The cubic root of 22212211 is about 281.1019964665.

Adding to 22212211 its reverse (11221222), we get a palindrome (33433433).

It can be divided in two parts, 2221221 and 1, that added together give a palindrome (2221222).

The spelling of 22212211 in words is "twenty-two million, two hundred twelve thousand, two hundred eleven".