20202000209021 has 2 divisors, whose sum is σ = 20202000209022. Its totient is φ = 20202000209020.

The previous prime is 20202000209011. The next prime is 20202000209029. The reversal of 20202000209021 is 12090200020202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11981193040996 + 8220807168025 = 3461386^2 + 2867195^2 .

It is a cyclic number.

It is not a de Polignac number, because 20202000209021 - 2¹⁴ = 20202000192637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20202000208984 and 20202000209002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20202000209029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10101000104510 + 10101000104511.

It is an arithmetic number, because the mean of its divisors is an integer number (10101000104511).

Almost surely, 2^{20202000209021} is an apocalyptic number.

It is an amenable number.

20202000209021 is a deficient number, since it is larger than the sum of its proper divisors (1).

20202000209021 is an equidigital number, since it uses as much as digits as its factorization.

20202000209021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 20202000209021 its reverse (12090200020202), we get a palindrome (32292200229223).

The spelling of 20202000209021 in words is "twenty trillion, two hundred two billion, two hundred nine thousand, twenty-one".