12221223 has 16 divisors (see below), whose sum is σ = 19224576. Its totient is φ = 6757920.

The previous prime is 12221207. The next prime is 12221233. The reversal of 12221223 is 32212221.

It is a happy number.

It is not a de Polignac number, because 12221223 - 2⁴ = 12221207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8736 + ... + 10037.

It is an arithmetic number, because the mean of its divisors is an integer number (1201536).

Almost surely, 2^12221223 is an apocalyptic number.

12221223 is a deficient number, since it is larger than the sum of its proper divisors (7003353).

12221223 is a wasteful number, since it uses less digits than its factorization.

12221223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18814.

The product of its digits is 96, while the sum is 15.

The square root of 12221223 is about 3495.8865828285. The cubic root of 12221223 is about 230.3411635125.

Adding to 12221223 its reverse (32212221), we get a palindrome (44433444).

The spelling of 12221223 in words is "twelve million, two hundred twenty-one thousand, two hundred twenty-three".