220202221221 has 40 divisors (see below), whose sum is σ = 336033688320. Its totient is φ = 143639207712.

The previous prime is 220202221207. The next prime is 220202221243. The reversal of 220202221221 is 122122202022.

220202221221 is a `hidden beast` number, since 2 + 20 + 202 + 221 + 221 = 666.

220202221221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 220202221221 - 2⁹ = 220202220709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220202221194 and 220202221203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220202220221) 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 39 ways as a sum of consecutive naturals, for example, 22863835 + ... + 22873463.

It is an arithmetic number, because the mean of its divisors is an integer number (8400842208).

Almost surely, 2^220202221221 is an apocalyptic number.

It is an amenable number.

220202221221 is a deficient number, since it is larger than the sum of its proper divisors (115831467099).

220202221221 is an equidigital number, since it uses as much as digits as its factorization.

220202221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15695 (or 15686 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 220202221221 its reverse (122122202022), we get a palindrome (342324423243).

The spelling of 220202221221 in words is "two hundred twenty billion, two hundred two million, two hundred twenty-one thousand, two hundred twenty-one".