12113220 has 96 divisors (see below), whose sum is σ = 39223296. Its totient is φ = 2736000.

The previous prime is 12113209. The next prime is 12113221. The reversal of 12113220 is 2231121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 12113196 and 12113205.

It is not an unprimeable number, because it can be changed into a prime (12113221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63325 + ... + 63515.

It is an arithmetic number, because the mean of its divisors is an integer number (408576).

Almost surely, 2^12113220 is an apocalyptic number.

12113220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12113220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19611648).

12113220 is an abundant number, since it is smaller than the sum of its proper divisors (27110076).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12113220 is a wasteful number, since it uses less digits than its factorization.

12113220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361 (or 359 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 12113220 is about 3480.4051488297. The cubic root of 12113220 is about 229.6606210853.

Adding to 12113220 its reverse (2231121), we get a palindrome (14344341).

The spelling of 12113220 in words is "twelve million, one hundred thirteen thousand, two hundred twenty".