12118216 has 16 divisors (see below), whose sum is σ = 24787440. Its totient is φ = 5508240.

The previous prime is 12118207. The next prime is 12118237. The reversal of 12118216 is 61281121.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68766 + ... + 68941.

It is an arithmetic number, because the mean of its divisors is an integer number (1549215).

Almost surely, 2^12118216 is an apocalyptic number.

It is an amenable number.

12118216 is an abundant number, since it is smaller than the sum of its proper divisors (12669224).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12118216 is a wasteful number, since it uses less digits than its factorization.

12118216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137724 (or 137720 counting only the distinct ones).

The product of its digits is 192, while the sum is 22.

The square root of 12118216 is about 3481.1228073712. The cubic root of 12118216 is about 229.6921906365.

Adding to 12118216 its reverse (61281121), we get a palindrome (73399337).

The spelling of 12118216 in words is "twelve million, one hundred eighteen thousand, two hundred sixteen".