10000210221 has 6 divisors (see below), whose sum is σ = 14444748110. Its totient is φ = 6666806808.

The previous prime is 10000210189. The next prime is 10000210243. The reversal of 10000210221 is 12201200001.

It can be written as a sum of positive squares in only one way, i.e., 6203925225 + 3796284996 = 78765^2 + 61614^2 .

It is not a de Polignac number, because 10000210221 - 2⁵ = 10000210189 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 1111134469 = 10000210221 / (1 + 0 + 0 + 0 + 0 + 2 + 1 + 0 + 2 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10000210291) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 555567226 + ... + 555567243.

Almost surely, 2^10000210221 is an apocalyptic number.

It is an amenable number.

10000210221 is a deficient number, since it is larger than the sum of its proper divisors (4444537889).

10000210221 is a wasteful number, since it uses less digits than its factorization.

10000210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111134475 (or 1111134472 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 10000210221 its reverse (12201200001), we get a palindrome (22201410222).

The spelling of 10000210221 in words is "ten billion, two hundred ten thousand, two hundred twenty-one".