221020110220 has 96 divisors (see below), whose sum is σ = 601317964800. Its totient is φ = 66267673344.

The previous prime is 221020110211. The next prime is 221020110221. The reversal of 221020110220 is 22011020122.

It is a happy number.

221020110220 is digitally balanced in base 3, 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 (13).

It is a self number, because there is not a number n which added to its sum of digits gives 221020110220.

It is not an unprimeable number, because it can be changed into a prime (221020110221) 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, 3161200 + ... + 3230359.

It is an arithmetic number, because the mean of its divisors is an integer number (6263728800).

Almost surely, 2^221020110220 is an apocalyptic number.

221020110220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221020110220 is an abundant number, since it is smaller than the sum of its proper divisors (380297854580).

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

221020110220 is a wasteful number, since it uses less digits than its factorization.

221020110220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6391607 (or 6391605 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 221020110220 its reverse (22011020122), we get a palindrome (243031130342).

The spelling of 221020110220 in words is "two hundred twenty-one billion, twenty million, one hundred ten thousand, two hundred twenty".