202100221 has 8 divisors (see below), whose sum is σ = 205416000. Its totient is φ = 198807840.

The previous prime is 202100219. The next prime is 202100237. The reversal of 202100221 is 122001202.

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 202100221 - 2¹ = 202100219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202100198 and 202100207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202100251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12006 + ... + 23416.

It is an arithmetic number, because the mean of its divisors is an integer number (25677000).

Almost surely, 2^202100221 is an apocalyptic number.

It is an amenable number.

202100221 is a deficient number, since it is larger than the sum of its proper divisors (3315779).

202100221 is a wasteful number, since it uses less digits than its factorization.

202100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11699.

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

The square root of 202100221 is about 14216.1957288158. The cubic root of 202100221 is about 586.8434516225.

Adding to 202100221 its reverse (122001202), we get a palindrome (324101423).

The spelling of 202100221 in words is "two hundred two million, one hundred thousand, two hundred twenty-one".