10205330021 has 2 divisors, whose sum is σ = 10205330022. Its totient is φ = 10205330020.

The previous prime is 10205330011. The next prime is 10205330033. The reversal of 10205330021 is 12003350201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5414752225 + 4790577796 = 73585^2 + 69214^2 .

It is a cyclic number.

It is not a de Polignac number, because 10205330021 - 2¹⁰ = 10205328997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10205330011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5102665010 + 5102665011.

It is an arithmetic number, because the mean of its divisors is an integer number (5102665011).

Almost surely, 2^10205330021 is an apocalyptic number.

It is an amenable number.

10205330021 is a deficient number, since it is larger than the sum of its proper divisors (1).

10205330021 is an equidigital number, since it uses as much as digits as its factorization.

10205330021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 17.

Adding to 10205330021 its reverse (12003350201), we get a palindrome (22208680222).

The spelling of 10205330021 in words is "ten billion, two hundred five million, three hundred thirty thousand, twenty-one".