202021301020121 has 16 divisors (see below), whose sum is σ = 224549730213120. Its totient is φ = 180186823614720.

The previous prime is 202021301020073. The next prime is 202021301020153. The reversal of 202021301020121 is 121020103120202.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202021301020121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 202021301020121.

It is not an unprimeable number, because it can be changed into a prime (202021307020121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25036976 + ... + 32107518.

It is an arithmetic number, because the mean of its divisors is an integer number (14034358138320).

Almost surely, 2^{202021301020121} is an apocalyptic number.

It is an amenable number.

202021301020121 is a deficient number, since it is larger than the sum of its proper divisors (22528429192999).

202021301020121 is a wasteful number, since it uses less digits than its factorization.

202021301020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7119616.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 202021301020121 its reverse (121020103120202), we get a palindrome (323041404140323).

The spelling of 202021301020121 in words is "two hundred two trillion, twenty-one billion, three hundred one million, twenty thousand, one hundred twenty-one".