202220020021221 has 6 divisors (see below), whose sum is σ = 292095584475110. Its totient is φ = 134813346680808.

The previous prime is 202220020021153. The next prime is 202220020021241. The reversal of 202220020021221 is 122120020022202.

202220020021221 is a `hidden beast` number, since 2 + 0 + 2 + 220 + 0 + 200 + 21 + 221 = 666.

It can be written as a sum of positive squares in only one way, i.e., 111349747913121 + 90870272108100 = 10552239^2 + 9532590^2 .

It is not a de Polignac number, because 202220020021221 - 2⁷ = 202220020021093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202220020021194 and 202220020021203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202220020021241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11234445556726 + ... + 11234445556743.

Almost surely, 2^{202220020021221} is an apocalyptic number.

It is an amenable number.

202220020021221 is a deficient number, since it is larger than the sum of its proper divisors (89875564453889).

202220020021221 is a wasteful number, since it uses less digits than its factorization.

202220020021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22468891113475 (or 22468891113472 counting only the distinct ones).

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

Adding to 202220020021221 its reverse (122120020022202), we get a palindrome (324340040043423).

The spelling of 202220020021221 in words is "two hundred two trillion, two hundred twenty billion, twenty million, twenty-one thousand, two hundred twenty-one".