12221606 has 16 divisors (see below), whose sum is σ = 19608480. Its totient is φ = 5692800.

The previous prime is 12221593. The next prime is 12221611. The reversal of 12221606 is 60612221.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1655 + ... + 5213.

It is an arithmetic number, because the mean of its divisors is an integer number (1225530).

Almost surely, 2^12221606 is an apocalyptic number.

12221606 is a deficient number, since it is larger than the sum of its proper divisors (7386874).

12221606 is a wasteful number, since it uses less digits than its factorization.

12221606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3679.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 12221606 is about 3495.9413610643. The cubic root of 12221606 is about 230.3435697023.

Adding to 12221606 its reverse (60612221), we get a palindrome (72833827).

The spelling of 12221606 in words is "twelve million, two hundred twenty-one thousand, six hundred six".