12200220 has 120 divisors (see below), whose sum is σ = 40615344. Its totient is φ = 3055104.

The previous prime is 12200179. The next prime is 12200239. The reversal of 12200220 is 2200221.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 27319 + ... + 27761.

Almost surely, 2^12200220 is an apocalyptic number.

12200220 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 12200220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20307672).

12200220 is an abundant number, since it is smaller than the sum of its proper divisors (28415124).

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

12200220 is a wasteful number, since it uses less digits than its factorization.

12200220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481 (or 470 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 12200220 is about 3492.8813320810. The cubic root of 12200220 is about 230.2091355504.

Adding to 12200220 its reverse (2200221), we get a palindrome (14400441).

Subtracting from 12200220 its reverse (2200221), we obtain a palindrome (9999999).

The spelling of 12200220 in words is "twelve million, two hundred thousand, two hundred twenty".