10000201221 has 8 divisors (see below), whose sum is σ = 14815112960. Its totient is φ = 6666800796.

The previous prime is 10000201219. The next prime is 10000201223. The reversal of 10000201221 is 12210200001.

10000201221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (10000201219) and next prime (10000201223).

It is not a de Polignac number, because 10000201221 - 2¹ = 10000201219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10000201223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185188885 + ... + 185188938.

It is an arithmetic number, because the mean of its divisors is an integer number (1851889120).

Almost surely, 2^10000201221 is an apocalyptic number.

It is an amenable number.

10000201221 is a deficient number, since it is larger than the sum of its proper divisors (4814911739).

10000201221 is an equidigital number, since it uses as much as digits as its factorization.

10000201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370377832 (or 370377826 counting only the distinct ones).

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

Adding to 10000201221 its reverse (12210200001), we get a palindrome (22210401222).

The spelling of 10000201221 in words is "ten billion, two hundred one thousand, two hundred twenty-one".