12218222 has 8 divisors (see below), whose sum is σ = 18959400. Its totient is φ = 5898424.

The previous prime is 12218209. The next prime is 12218233. The reversal of 12218222 is 22281221.

It is a happy number.

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 = 12218194 and 12218203.

It is a congruent number.

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, 105272 + ... + 105387.

It is an arithmetic number, because the mean of its divisors is an integer number (2369925).

Almost surely, 2^12218222 is an apocalyptic number.

12218222 is a deficient number, since it is larger than the sum of its proper divisors (6741178).

12218222 is a wasteful number, since it uses less digits than its factorization.

12218222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210690.

The product of its digits is 256, while the sum is 20.

The square root of 12218222 is about 3495.4573377457. The cubic root of 12218222 is about 230.3223080505.

Adding to 12218222 its reverse (22281221), we get a palindrome (34499443).

The spelling of 12218222 in words is "twelve million, two hundred eighteen thousand, two hundred twenty-two".