220011220 has 96 divisors (see below), whose sum is σ = 555730560. Its totient is φ = 72092160.

The previous prime is 220011199. The next prime is 220011223. The reversal of 220011220 is 22110022.

220011220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 220011197 and 220011206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220011223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 122086 + ... + 123874.

It is an arithmetic number, because the mean of its divisors is an integer number (5788860).

Almost surely, 2^220011220 is an apocalyptic number.

220011220 is a gapful number since it is divisible by the number (20) 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 220011220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (277865280).

220011220 is an abundant number, since it is smaller than the sum of its proper divisors (335719340).

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

220011220 is a wasteful number, since it uses less digits than its factorization.

220011220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1865 (or 1863 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 220011220 is about 14832.7751954919. The cubic root of 220011220 is about 603.6913360836.

Adding to 220011220 its reverse (22110022), we get a palindrome (242121242).

The spelling of 220011220 in words is "two hundred twenty million, eleven thousand, two hundred twenty".