10020201221 has 12 divisors (see below), whose sum is σ = 10292242272. Its totient is φ = 9754383624.

The previous prime is 10020201203. The next prime is 10020201223. The reversal of 10020201221 is 12210202001.

It is a happy number.

It is not a de Polignac number, because 10020201221 - 2³⁰ = 8946459397 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 (10020201223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 344570 + ... + 372516.

It is an arithmetic number, because the mean of its divisors is an integer number (857686856).

Almost surely, 2^10020201221 is an apocalyptic number.

It is an amenable number.

10020201221 is a deficient number, since it is larger than the sum of its proper divisors (272041051).

10020201221 is an equidigital number, since it uses as much as digits as its factorization.

10020201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28168 (or 28109 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 10020201221 its reverse (12210202001), we get a palindrome (22230403222).

The spelling of 10020201221 in words is "ten billion, twenty million, two hundred one thousand, two hundred twenty-one".