12213320 has 64 divisors (see below), whose sum is σ = 32037120. Its totient is φ = 4103424.

The previous prime is 12213319. The next prime is 12213329. The reversal of 12213320 is 2331221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 12213295 and 12213304.

It is not an unprimeable number, because it can be changed into a prime (12213329) 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 15 ways as a sum of consecutive naturals, for example, 14429 + ... + 15251.

It is an arithmetic number, because the mean of its divisors is an integer number (500580).

Almost surely, 2^12213320 is an apocalyptic number.

12213320 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 12213320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16018560).

12213320 is an abundant number, since it is smaller than the sum of its proper divisors (19823800).

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

12213320 is a wasteful number, since it uses less digits than its factorization.

12213320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894 (or 890 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 12213320 is about 3494.7560716021. The cubic root of 12213320 is about 230.2915018502.

Adding to 12213320 its reverse (2331221), we get a palindrome (14544541).

The spelling of 12213320 in words is "twelve million, two hundred thirteen thousand, three hundred twenty".