12221242 has 16 divisors (see below), whose sum is σ = 20168064. Its totient is φ = 5553900.

The previous prime is 12221233. The next prime is 12221243. The reversal of 12221242 is 24212221.

It is not an unprimeable number, because it can be changed into a prime (12221243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 367 + ... + 4957.

It is an arithmetic number, because the mean of its divisors is an integer number (1260504).

Almost surely, 2^12221242 is an apocalyptic number.

12221242 is a deficient number, since it is larger than the sum of its proper divisors (7946822).

12221242 is an equidigital number, since it uses as much as digits as its factorization.

12221242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4626 (or 4604 counting only the distinct ones).

The product of its digits is 128, while the sum is 16.

The square root of 12221242 is about 3495.8893003069. The cubic root of 12221242 is about 230.3412828808.

Adding to 12221242 its reverse (24212221), we get a palindrome (36433463).

The spelling of 12221242 in words is "twelve million, two hundred twenty-one thousand, two hundred forty-two".