220221113220 has 144 divisors (see below), whose sum is σ = 678236727168. Its totient is φ = 57828072960.

The previous prime is 220221113213. The next prime is 220221113221. The reversal of 220221113220 is 22311122022.

220221113220 is a `hidden beast` number, since 220 + 2 + 211 + 13 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 220221113193 and 220221113202.

It is not an unprimeable number, because it can be changed into a prime (220221113221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10942407 + ... + 10962513.

It is an arithmetic number, because the mean of its divisors is an integer number (4709977272).

Almost surely, 2^220221113220 is an apocalyptic number.

220221113220 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 220221113220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (339118363584).

220221113220 is an abundant number, since it is smaller than the sum of its proper divisors (458015613948).

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

220221113220 is a wasteful number, since it uses less digits than its factorization.

220221113220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21050 (or 21045 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 220221113220 its reverse (22311122022), we get a palindrome (242532235242).

The spelling of 220221113220 in words is "two hundred twenty billion, two hundred twenty-one million, one hundred thirteen thousand, two hundred twenty".