202020100000221 has 16 divisors (see below), whose sum is σ = 272880323456000. Its totient is φ = 132921353708208.

The previous prime is 202020100000177. The next prime is 202020100000259. The reversal of 202020100000221 is 122000001020202.

It is not a de Polignac number, because 202020100000221 - 2²⁵ = 202020066445789 is a prime.

It is a super-3 number, since 3×202020100000221³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202020100000197 and 202020100000206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202020100001221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 172176871 + ... + 173346228.

It is an arithmetic number, because the mean of its divisors is an integer number (17055020216000).

Almost surely, 2^{202020100000221} is an apocalyptic number.

It is an amenable number.

202020100000221 is a deficient number, since it is larger than the sum of its proper divisors (70860223455779).

202020100000221 is a wasteful number, since it uses less digits than its factorization.

202020100000221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345525648.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 202020100000221 its reverse (122000001020202), we get a palindrome (324020101020423).

The spelling of 202020100000221 in words is "two hundred two trillion, twenty billion, one hundred million, two hundred twenty-one", and thus it is an aban number.