201020210221 has 8 divisors (see below), whose sum is σ = 201491616024. Its totient is φ = 200549305920.

The previous prime is 201020210201. The next prime is 201020210231. The reversal of 201020210221 is 122012020102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 35021005321 + 165999204900 = 187139^2 + 407430^2 .

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 201020210221 - 2⁵ = 201020210189 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 (201020210201) 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, 683331 + ... + 932191.

It is an arithmetic number, because the mean of its divisors is an integer number (25186452003).

Almost surely, 2^201020210221 is an apocalyptic number.

It is an amenable number.

201020210221 is a deficient number, since it is larger than the sum of its proper divisors (471405803).

201020210221 is a wasteful number, since it uses less digits than its factorization.

201020210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250751.

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

Adding to 201020210221 its reverse (122012020102), we get a palindrome (323032230323).

The spelling of 201020210221 in words is "two hundred one billion, twenty million, two hundred ten thousand, two hundred twenty-one".