12228111 has 64 divisors (see below), whose sum is σ = 22579200. Its totient is φ = 6386688.

The previous prime is 12228091. The next prime is 12228113. The reversal of 12228111 is 11182221.

It is not a de Polignac number, because 12228111 - 2⁵ = 12228079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12228113) 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, 126015 + ... + 126111.

It is an arithmetic number, because the mean of its divisors is an integer number (352800).

Almost surely, 2^12228111 is an apocalyptic number.

12228111 is a deficient number, since it is larger than the sum of its proper divisors (10351089).

12228111 is a wasteful number, since it uses less digits than its factorization.

12228111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165 (or 159 counting only the distinct ones).

The product of its digits is 64, while the sum is 18.

The square root of 12228111 is about 3496.8716018750. The cubic root of 12228111 is about 230.3844295576.

The spelling of 12228111 in words is "twelve million, two hundred twenty-eight thousand, one hundred eleven".