12201218 has 8 divisors (see below), whose sum is σ = 18321660. Its totient is φ = 6094000.

The previous prime is 12201193. The next prime is 12201229. The reversal of 12201218 is 81210221.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12201049 + 169 = 3493^2 + 13^2 .

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 = 12201196 and 12201205.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 533 + ... + 4968.

Almost surely, 2^12201218 is an apocalyptic number.

12201218 is a deficient number, since it is larger than the sum of its proper divisors (6120442).

12201218 is a wasteful number, since it uses less digits than its factorization.

12201218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6612.

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 12201218 is about 3493.0241911559. The cubic root of 12201218 is about 230.2154125534.

Adding to 12201218 its reverse (81210221), we get a palindrome (93411439).

The spelling of 12201218 in words is "twelve million, two hundred one thousand, two hundred eighteen".