201020201221 has 8 divisors (see below), whose sum is σ = 230003587584. Its totient is φ = 172103368560.

The previous prime is 201020201209. The next prime is 201020201231. The reversal of 201020201221 is 122102020102.

It is a happy number.

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 201020201221 - 2¹⁷ = 201020070149 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 (201020201231) 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, 16631950 + ... + 16644031.

It is an arithmetic number, because the mean of its divisors is an integer number (28750448448).

Almost surely, 2^201020201221 is an apocalyptic number.

It is an amenable number.

201020201221 is a deficient number, since it is larger than the sum of its proper divisors (28983386363).

201020201221 is an equidigital number, since it uses as much as digits as its factorization.

201020201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33276851.

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

Adding to 201020201221 its reverse (122102020102), we get a palindrome (323122221323).

The spelling of 201020201221 in words is "two hundred one billion, twenty million, two hundred one thousand, two hundred twenty-one".