20321030030221 has 2 divisors, whose sum is σ = 20321030030222. Its totient is φ = 20321030030220.

The previous prime is 20321030030201. The next prime is 20321030030227. The reversal of 20321030030221 is 12203003012302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15621070522500 + 4699959507721 = 3952350^2 + 2167939^2 .

It is a cyclic number.

It is not a de Polignac number, because 20321030030221 - 2¹⁵ = 20321029997453 is a prime.

It is a super-2 number, since 2×20321030030221² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20321030030227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10160515015110 + 10160515015111.

It is an arithmetic number, because the mean of its divisors is an integer number (10160515015111).

Almost surely, 2^{20321030030221} is an apocalyptic number.

It is an amenable number.

20321030030221 is a deficient number, since it is larger than the sum of its proper divisors (1).

20321030030221 is an equidigital number, since it uses as much as digits as its factorization.

20321030030221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 20321030030221 its reverse (12203003012302), we get a palindrome (32524033042523).

The spelling of 20321030030221 in words is "twenty trillion, three hundred twenty-one billion, thirty million, thirty thousand, two hundred twenty-one".