220021201221 has 8 divisors (see below), whose sum is σ = 293624239584. Its totient is φ = 146549481840.

The previous prime is 220021201171. The next prime is 220021201243. The reversal of 220021201221 is 122102120022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 220021201221 - 2¹⁴ = 220021184837 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 220021201221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220021201271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32825835 + ... + 32832536.

It is an arithmetic number, because the mean of its divisors is an integer number (36703029948).

Almost surely, 2^220021201221 is an apocalyptic number.

It is an amenable number.

220021201221 is a deficient number, since it is larger than the sum of its proper divisors (73603038363).

220021201221 is a wasteful number, since it uses less digits than its factorization.

220021201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65659491.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 220021201221 its reverse (122102120022), we get a palindrome (342123321243).

The spelling of 220021201221 in words is "two hundred twenty billion, twenty-one million, two hundred one thousand, two hundred twenty-one".