220002211221021 has 20 divisors (see below), whose sum is σ = 347977353698172. Its totient is φ = 138040603118208.

The previous prime is 220002211221011. The next prime is 220002211221113. The reversal of 220002211221021 is 120122112200022.

It is a happy number.

220002211221021 is a `hidden beast` number, since 2 + 200 + 0 + 221 + 1 + 221 + 0 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 176860368840996 + 43141842380025 = 13298886^2 + 6568245^2 .

It is not a de Polignac number, because 220002211221021 - 2¹⁰ = 220002211219997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220002211220985 and 220002211221003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220002211221011) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 79884606910 + ... + 79884609663.

Almost surely, 2^{220002211221021} is an apocalyptic number.

It is an amenable number.

220002211221021 is a deficient number, since it is larger than the sum of its proper divisors (127975142477151).

220002211221021 is a wasteful number, since it uses less digits than its factorization.

220002211221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159769216602 (or 159769216593 counting only the distinct ones).

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

Adding to 220002211221021 its reverse (120122112200022), we get a palindrome (340124323421043).

The spelling of 220002211221021 in words is "two hundred twenty trillion, two billion, two hundred eleven million, two hundred twenty-one thousand, twenty-one".