20203201202021 has 2 divisors, whose sum is σ = 20203201202022. Its totient is φ = 20203201202020.

The previous prime is 20203201201907. The next prime is 20203201202029. The reversal of 20203201202021 is 12020210230202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18329409813796 + 1873791388225 = 4281286^2 + 1368865^2 .

It is a cyclic number.

It is not a de Polignac number, because 20203201202021 - 2¹⁰ = 20203201200997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20203201202029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10101600601010 + 10101600601011.

It is an arithmetic number, because the mean of its divisors is an integer number (10101600601011).

Almost surely, 2^{20203201202021} is an apocalyptic number.

It is an amenable number.

20203201202021 is a deficient number, since it is larger than the sum of its proper divisors (1).

20203201202021 is an equidigital number, since it uses as much as digits as its factorization.

20203201202021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 20203201202021 its reverse (12020210230202), we get a palindrome (32223411432223).

The spelling of 20203201202021 in words is "twenty trillion, two hundred three billion, two hundred one million, two hundred two thousand, twenty-one".