12220112 has 10 divisors (see below), whose sum is σ = 23676498. Its totient is φ = 6110048.

The previous prime is 12220111. The next prime is 12220129. The reversal of 12220112 is 21102221.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 6948496 + 5271616 = 2636^2 + 2296^2 .

It is a super-3 number, since 3×12220112³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 12220093 and 12220102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220111) by changing a digit.

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 as a sum of consecutive naturals, namely, 381863 + ... + 381894.

Almost surely, 2^12220112 is an apocalyptic number.

It is an amenable number.

12220112 is a deficient number, since it is larger than the sum of its proper divisors (11456386).

12220112 is an equidigital number, since it uses as much as digits as its factorization.

12220112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763765 (or 763759 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 12220112 is about 3495.7276781809. The cubic root of 12220112 is about 230.3341833931.

Adding to 12220112 its reverse (21102221), we get a palindrome (33322333).

The spelling of 12220112 in words is "twelve million, two hundred twenty thousand, one hundred twelve".