220200221221 has 4 divisors (see below), whose sum is σ = 222674381100. Its totient is φ = 217726061344.

The previous prime is 220200221209. The next prime is 220200221239. The reversal of 220200221221 is 122122002022.

220200221221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 129517932996 + 90682288225 = 359886^2 + 301135^2 .

It is a cyclic number.

It is not a de Polignac number, because 220200221221 - 2²⁵ = 220166666789 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220200221195 and 220200221204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220200221921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1237079806 + ... + 1237079983.

It is an arithmetic number, because the mean of its divisors is an integer number (55668595275).

Almost surely, 2^220200221221 is an apocalyptic number.

It is an amenable number.

220200221221 is a deficient number, since it is larger than the sum of its proper divisors (2474159879).

220200221221 is an equidigital number, since it uses as much as digits as its factorization.

220200221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2474159878.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 220200221221 its reverse (122122002022), we get a palindrome (342322223243).

The spelling of 220200221221 in words is "two hundred twenty billion, two hundred million, two hundred twenty-one thousand, two hundred twenty-one".