12221116 has 24 divisors (see below), whose sum is σ = 22431024. Its totient is φ = 5819520.

The previous prime is 12221107. The next prime is 12221117. The reversal of 12221116 is 61112221.

12221116 is nontrivially palindromic in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 12221116.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221117) 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, 6186 + ... + 7918.

It is an arithmetic number, because the mean of its divisors is an integer number (934626).

Almost surely, 2^12221116 is an apocalyptic number.

It is an amenable number.

12221116 is a deficient number, since it is larger than the sum of its proper divisors (10209908).

12221116 is a wasteful number, since it uses less digits than its factorization.

12221116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1821 (or 1819 counting only the distinct ones).

The product of its digits is 48, while the sum is 16.

The square root of 12221116 is about 3495.8712790948. The cubic root of 12221116 is about 230.3404912782.

Adding to 12221116 its reverse (61112221), we get a palindrome (73333337).

The spelling of 12221116 in words is "twelve million, two hundred twenty-one thousand, one hundred sixteen".