202001020121 has 2 divisors, whose sum is σ = 202001020122. Its totient is φ = 202001020120.

The previous prime is 202001020033. The next prime is 202001020129. The reversal of 202001020121 is 121020100202.

It is a happy number.

202001020121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189041474521 + 12959545600 = 434789^2 + 113840^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202001020121 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (202001020129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101000510060 + 101000510061.

It is an arithmetic number, because the mean of its divisors is an integer number (101000510061).

Almost surely, 2^202001020121 is an apocalyptic number.

It is an amenable number.

202001020121 is a deficient number, since it is larger than the sum of its proper divisors (1).

202001020121 is an equidigital number, since it uses as much as digits as its factorization.

202001020121 is an odious number, because the sum of its binary digits is odd.

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

Adding to 202001020121 its reverse (121020100202), we get a palindrome (323021120323).

The spelling of 202001020121 in words is "two hundred two billion, one million, twenty thousand, one hundred twenty-one".