221220102110220 has 72 divisors (see below), whose sum is σ = 700209714518496. Its totient is φ = 56427156479232.

The previous prime is 221220102110179. The next prime is 221220102110239. The reversal of 221220102110220 is 22011201022122.

It is a happy number.

221220102110220 is a `hidden beast` number, since 2 + 2 + 1 + 220 + 10 + 211 + 0 + 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 = 221220102110193 and 221220102110202.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26717399497 + ... + 26717407776.

It is an arithmetic number, because the mean of its divisors is an integer number (9725134923868).

Almost surely, 2^{221220102110220} is an apocalyptic number.

221220102110220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221220102110220 is an abundant number, since it is smaller than the sum of its proper divisors (478989612408276).

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

221220102110220 is a wasteful number, since it uses less digits than its factorization.

221220102110220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53434807311 (or 53434807306 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 221220102110220 its reverse (22011201022122), we get a palindrome (243231303132342).

The spelling of 221220102110220 in words is "two hundred twenty-one trillion, two hundred twenty billion, one hundred two million, one hundred ten thousand, two hundred twenty".