2021022212221 has 8 divisors (see below), whose sum is σ = 2022494344640. Its totient is φ = 2019550459968.

The previous prime is 2021022212207. The next prime is 2021022212227. The reversal of 2021022212221 is 1222122201202.

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

It is a cyclic number.

It is not a de Polignac number, because 2021022212221 - 2⁷ = 2021022212093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021022212227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11009890 + ... + 11191948.

It is an arithmetic number, because the mean of its divisors is an integer number (252811793080).

Almost surely, 2^{2021022212221} is an apocalyptic number.

It is an amenable number.

2021022212221 is a deficient number, since it is larger than the sum of its proper divisors (1472132419).

2021022212221 is a wasteful number, since it uses less digits than its factorization.

2021022212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190083.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 2021022212221 its reverse (1222122201202), we get a palindrome (3243144413423).

The spelling of 2021022212221 in words is "two trillion, twenty-one billion, twenty-two million, two hundred twelve thousand, two hundred twenty-one".