12220220 has 12 divisors (see below), whose sum is σ = 25662504. Its totient is φ = 4888080.

The previous prime is 12220217. The next prime is 12220237. The reversal of 12220220 is 2202221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 305486 + ... + 305525.

It is an arithmetic number, because the mean of its divisors is an integer number (2138542).

Almost surely, 2^12220220 is an apocalyptic number.

12220220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12220220 is an abundant number, since it is smaller than the sum of its proper divisors (13442284).

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

12220220 is a wasteful number, since it uses less digits than its factorization.

12220220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611020 (or 611018 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 12220220 is about 3495.7431255743. The cubic root of 12220220 is about 230.3348619471.

Adding to 12220220 its reverse (2202221), we get a palindrome (14422441).

The spelling of 12220220 in words is "twelve million, two hundred twenty thousand, two hundred twenty".