202000100221 has 4 divisors (see below), whose sum is σ = 202007904700. Its totient is φ = 201992295744.

The previous prime is 202000100131. The next prime is 202000100227. The reversal of 202000100221 is 122001000202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122001000202 = 2 ⋅61000500101.

It can be written as a sum of positive squares in 2 ways, for example, as 67802431321 + 134197668900 = 260389^2 + 366330^2 .

It is a cyclic number.

It is not a de Polignac number, because 202000100221 - 2²¹ = 201998003069 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202000100198 and 202000100207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202000100227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3863286 + ... + 3915223.

It is an arithmetic number, because the mean of its divisors is an integer number (50501976175).

Almost surely, 2^202000100221 is an apocalyptic number.

It is an amenable number.

202000100221 is a deficient number, since it is larger than the sum of its proper divisors (7804479).

202000100221 is an equidigital number, since it uses as much as digits as its factorization.

202000100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7804478.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 202000100221 its reverse (122001000202), we get a palindrome (324001100423).

The spelling of 202000100221 in words is "two hundred two billion, one hundred thousand, two hundred twenty-one".