20020222100221 has 24 divisors (see below), whose sum is σ = 23320071673080. Its totient is φ = 17137180150272.

The previous prime is 20020222100173. The next prime is 20020222100227. The reversal of 20020222100221 is 12200122202002.

It can be written as a sum of positive squares in 4 ways, for example, as 151896488121 + 19868325612100 = 389739^2 + 4457390^2 .

It is not a de Polignac number, because 20020222100221 - 2¹⁹ = 20020221575933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20020222100195 and 20020222100204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020222100227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 172988251 + ... + 173103943.

It is an arithmetic number, because the mean of its divisors is an integer number (971669653045).

Almost surely, 2^{20020222100221} is an apocalyptic number.

It is an amenable number.

20020222100221 is a deficient number, since it is larger than the sum of its proper divisors (3299849572859).

20020222100221 is a wasteful number, since it uses less digits than its factorization.

20020222100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120413 (or 120406 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 20020222100221 its reverse (12200122202002), we get a palindrome (32220344302223).

The spelling of 20020222100221 in words is "twenty trillion, twenty billion, two hundred twenty-two million, one hundred thousand, two hundred twenty-one".