12221066 has 48 divisors (see below), whose sum is σ = 22926240. Its totient is φ = 4829760.

The previous prime is 12221057. The next prime is 12221071. The reversal of 12221066 is 66012221.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70556 + ... + 70728.

It is an arithmetic number, because the mean of its divisors is an integer number (477630).

Almost surely, 2^12221066 is an apocalyptic number.

12221066 is a deficient number, since it is larger than the sum of its proper divisors (10705174).

12221066 is a wasteful number, since it uses less digits than its factorization.

12221066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231 (or 218 counting only the distinct ones).

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

The square root of 12221066 is about 3495.8641277944. The cubic root of 12221066 is about 230.3401771487.

Adding to 12221066 its reverse (66012221), we get a palindrome (78233287).

The spelling of 12221066 in words is "twelve million, two hundred twenty-one thousand, sixty-six".