12218 has 8 divisors (see below), whose sum is σ = 18900. Its totient is φ = 5920.

The previous prime is 12211. The next prime is 12227. The reversal of 12218 is 81221.

12218 is nontrivially palindromic in base 8.

It can be written as a sum of positive squares in 2 ways, for example, as 9409 + 2809 = 97^2 + 53^2 .

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

It is not an unprimeable number, because it can be changed into a prime (12211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8 + ... + 156.

2¹²²¹⁸ is an apocalyptic number.

12218 is a deficient number, since it is larger than the sum of its proper divisors (6682).

12218 is a wasteful number, since it uses less digits than its factorization.

12218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192.

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

The square root of 12218 is about 110.5350623106. The cubic root of 12218 is about 23.0320913089.

Adding to 12218 its reverse (81221), we get a palindrome (93439).

The spelling of 12218 in words is "twelve thousand, two hundred eighteen".