12216422 has 8 divisors (see below), whose sum is σ = 18635400. Its totient is φ = 6004624.

The previous prime is 12216419. The next prime is 12216431. The reversal of 12216422 is 22461221.

It is a happy number.

12216422 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 = 12216394 and 12216403.

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, 51647 + ... + 51882.

It is an arithmetic number, because the mean of its divisors is an integer number (2329425).

Almost surely, 2^12216422 is an apocalyptic number.

12216422 is a deficient number, since it is larger than the sum of its proper divisors (6418978).

12216422 is a wasteful number, since it uses less digits than its factorization.

12216422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103590.

The product of its digits is 384, while the sum is 20.

The square root of 12216422 is about 3495.1998512245. The cubic root of 12216422 is about 230.3109970617.

Adding to 12216422 its reverse (22461221), we get a palindrome (34677643).

The spelling of 12216422 in words is "twelve million, two hundred sixteen thousand, four hundred twenty-two".