20021122110221 has 16 divisors (see below), whose sum is σ = 21740061850560. Its totient is φ = 18377983831680.

The previous prime is 20021122110167. The next prime is 20021122110251. The reversal of 20021122110221 is 12201122112002.

It is a cyclic number.

It is not a de Polignac number, because 20021122110221 - 2¹⁴ = 20021122093837 is a prime.

It is a super-3 number, since 3×20021122110221³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20021122110221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021122110251) 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 15 ways as a sum of consecutive naturals, for example, 128836376 + ... + 128991681.

It is an arithmetic number, because the mean of its divisors is an integer number (1358753865660).

Almost surely, 2^{20021122110221} is an apocalyptic number.

It is an amenable number.

20021122110221 is a deficient number, since it is larger than the sum of its proper divisors (1718939740339).

20021122110221 is a wasteful number, since it uses less digits than its factorization.

20021122110221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257828204.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20021122110221 its reverse (12201122112002), we get a palindrome (32222244222223).

The spelling of 20021122110221 in words is "twenty trillion, twenty-one billion, one hundred twenty-two million, one hundred ten thousand, two hundred twenty-one".