211222211 has 2 divisors, whose sum is σ = 211222212. Its totient is φ = 211222210.

The previous prime is 211222169. The next prime is 211222217. The reversal of 211222211 is 112222112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211222211 - 2⁶ = 211222147 is a prime.

It is a super-2 number, since 2×211222211² = 89229644839457042, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (211222217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105611105 + 105611106.

It is an arithmetic number, because the mean of its divisors is an integer number (105611106).

Almost surely, 2^211222211 is an apocalyptic number.

211222211 is a deficient number, since it is larger than the sum of its proper divisors (1).

211222211 is an equidigital number, since it uses as much as digits as its factorization.

211222211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32, while the sum is 14.

The square root of 211222211 is about 14533.4858516462. The cubic root of 211222211 is about 595.5430966241.

Adding to 211222211 its reverse (112222112), we get a palindrome (323444323).

Subtracting from 211222211 its reverse (112222112), we obtain a palindrome (99000099).

It can be divided in two parts, 2 and 11222211, that multiplied together give a palindrome (22444422).

The spelling of 211222211 in words is "two hundred eleven million, two hundred twenty-two thousand, two hundred eleven".