12111218 has 8 divisors (see below), whose sum is σ = 20762112. Its totient is φ = 5190516.

The previous prime is 12111217. The next prime is 12111221. The reversal of 12111218 is 81211121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 12111196 and 12111205.

It is not an unprimeable number, because it can be changed into a prime (12111217) 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 3 ways as a sum of consecutive naturals, for example, 432530 + ... + 432557.

It is an arithmetic number, because the mean of its divisors is an integer number (2595264).

Almost surely, 2^12111218 is an apocalyptic number.

12111218 is a deficient number, since it is larger than the sum of its proper divisors (8650894).

12111218 is an equidigital number, since it uses as much as digits as its factorization.

12111218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865096.

The product of its digits is 32, while the sum is 17.

The square root of 12111218 is about 3480.1175267511. The cubic root of 12111218 is about 229.6479680804.

Adding to 12111218 its reverse (81211121), we get a palindrome (93322339).

The spelling of 12111218 in words is "twelve million, one hundred eleven thousand, two hundred eighteen".