220021112220 has 576 divisors, whose sum is σ = 803405869056. Its totient is φ = 44557793280.

The previous prime is 220021112197. The next prime is 220021112221. The reversal of 220021112220 is 22211120022.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 220021112220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220021112221) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 95204865 + ... + 95207175.

It is an arithmetic number, because the mean of its divisors is an integer number (1394801856).

Almost surely, 2^220021112220 is an apocalyptic number.

220021112220 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 220021112220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (401702934528).

220021112220 is an abundant number, since it is smaller than the sum of its proper divisors (583384756836).

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

220021112220 is a wasteful number, since it uses less digits than its factorization.

220021112220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2450 (or 2441 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 220021112220 its reverse (22211120022), we get a palindrome (242232232242).

The spelling of 220021112220 in words is "two hundred twenty billion, twenty-one million, one hundred twelve thousand, two hundred twenty".