12080218 has 4 divisors (see below), whose sum is σ = 18120330. Its totient is φ = 6040108.

The previous prime is 12080207. The next prime is 12080231. The reversal of 12080218 is 81208021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 11648569 + 431649 = 3413^2 + 657^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 as a sum of consecutive naturals, namely, 3020053 + ... + 3020056.

Almost surely, 2^12080218 is an apocalyptic number.

12080218 is a deficient number, since it is larger than the sum of its proper divisors (6040112).

12080218 is an equidigital number, since it uses as much as digits as its factorization.

12080218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6040111.

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 12080218 is about 3475.6608004810. The cubic root of 12080218 is about 229.4518642233.

Adding to 12080218 its reverse (81208021), we get a palindrome (93288239).

The spelling of 12080218 in words is "twelve million, eighty thousand, two hundred eighteen".