222111211 has 16 divisors (see below), whose sum is σ = 260941824. Its totient is φ = 185097024.

The previous prime is 222111209. The next prime is 222111233. The reversal of 222111211 is 112111222.

It is not a de Polignac number, because 222111211 - 2¹ = 222111209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222111191 and 222111200.

It is not an unprimeable number, because it can be changed into a prime (222111251) 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 in 15 ways as a sum of consecutive naturals, for example, 68550 + ... + 71716.

It is an arithmetic number, because the mean of its divisors is an integer number (16308864).

Almost surely, 2^222111211 is an apocalyptic number.

222111211 is a deficient number, since it is larger than the sum of its proper divisors (38830613).

222111211 is a wasteful number, since it uses less digits than its factorization.

222111211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3450.

The product of its digits is 16, while the sum is 13.

The square root of 222111211 is about 14903.3959552848. The cubic root of 222111211 is about 605.6059870888.

Adding to 222111211 its reverse (112111222), we get a palindrome (334222433).

The spelling of 222111211 in words is "two hundred twenty-two million, one hundred eleven thousand, two hundred eleven".