220122220 has 48 divisors (see below), whose sum is σ = 488204640. Its totient is φ = 83137536.

The previous prime is 220122181. The next prime is 220122233. The reversal of 220122220 is 22221022.

It is a self number, because there is not a number n which added to its sum of digits gives 220122220.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140964 + ... + 142516.

It is an arithmetic number, because the mean of its divisors is an integer number (10170930).

Almost surely, 2^220122220 is an apocalyptic number.

220122220 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 220122220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (244102320).

220122220 is an abundant number, since it is smaller than the sum of its proper divisors (268082420).

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

220122220 is a wasteful number, since it uses less digits than its factorization.

220122220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1954 (or 1952 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 220122220 is about 14836.5164374930. The cubic root of 220122220 is about 603.7928437434.

Adding to 220122220 its reverse (22221022), we get a palindrome (242343242).

The spelling of 220122220 in words is "two hundred twenty million, one hundred twenty-two thousand, two hundred twenty".