210020102221 has 8 divisors (see below), whose sum is σ = 212208167864. Its totient is φ = 207832504320.

The previous prime is 210020102213. The next prime is 210020102231. The reversal of 210020102221 is 122201020012.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 430106121 + 209589996100 = 20739^2 + 457810^2 .

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 210020102221 - 2³ = 210020102213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210020102231) 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, 825061 + ... + 1049173.

It is an arithmetic number, because the mean of its divisors is an integer number (26526020983).

Almost surely, 2^210020102221 is an apocalyptic number.

It is an amenable number.

210020102221 is a deficient number, since it is larger than the sum of its proper divisors (2188065643).

210020102221 is an equidigital number, since it uses as much as digits as its factorization.

210020102221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233871.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 210020102221 its reverse (122201020012), we get a palindrome (332221122233).

The spelling of 210020102221 in words is "two hundred ten billion, twenty million, one hundred two thousand, two hundred twenty-one".