11222211 has 64 divisors (see below), whose sum is σ = 20837376. Its totient is φ = 5184000.

The previous prime is 11222209. The next prime is 11222219.

11222211 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 11222211 - 2¹ = 11222209 is a prime.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (11222219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 111061 + ... + 111161.

It is an arithmetic number, because the mean of its divisors is an integer number (325584).

Almost surely, 2^11222211 is an apocalyptic number.

11222211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11222211 is a deficient number, since it is larger than the sum of its proper divisors (9615165).

11222211 is a wasteful number, since it uses less digits than its factorization.

11222211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172.

The product of its digits is 16, while the sum is 12.

The square root of 11222211 is about 3349.9568653939. The cubic root of 11222211 is about 223.8855907563.

It can be divided in two parts, 1122 and 2211, that added together give a palindrome (3333).

The spelling of 11222211 in words is "eleven million, two hundred twenty-two thousand, two hundred eleven".