12220208 has 120 divisors (see below), whose sum is σ = 32654160. Its totient is φ = 4354560.

The previous prime is 12220193. The next prime is 12220217. The reversal of 12220208 is 80202221.

It is a nialpdrome in base 16.

It is an unprimeable number.

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 in 23 ways as a sum of consecutive naturals, for example, 112058 + ... + 112166.

It is an arithmetic number, because the mean of its divisors is an integer number (272118).

Almost surely, 2^12220208 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12220208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16327080).

12220208 is an abundant number, since it is smaller than the sum of its proper divisors (20433952).

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

12220208 is a wasteful number, since it uses less digits than its factorization.

12220208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 12220208 is about 3495.7414092006. The cubic root of 12220208 is about 230.3347865524.

Multiplying 12220208 by its sum of digits (17), we get a triangular number (207743536 = T₂₀₃₈₃).

Adding to 12220208 its reverse (80202221), we get a palindrome (92422429).

The spelling of 12220208 in words is "twelve million, two hundred twenty thousand, two hundred eight".