202020212321 has 2 divisors, whose sum is σ = 202020212322. Its totient is φ = 202020212320.

The previous prime is 202020212311. The next prime is 202020212323. The reversal of 202020212321 is 123212020202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198118461025 + 3901751296 = 445105^2 + 62464^2 .

It is a cyclic number.

It is not a de Polignac number, because 202020212321 - 2³⁰ = 200946470497 is a prime.

Together with 202020212323, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 202020212321.

It is not a weakly prime, because it can be changed into another prime (202020212323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101010106160 + 101010106161.

It is an arithmetic number, because the mean of its divisors is an integer number (101010106161).

Almost surely, 2^202020212321 is an apocalyptic number.

It is an amenable number.

202020212321 is a deficient number, since it is larger than the sum of its proper divisors (1).

202020212321 is an equidigital number, since it uses as much as digits as its factorization.

202020212321 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 202020212321 its reverse (123212020202), we get a palindrome (325232232523).

The spelling of 202020212321 in words is "two hundred two billion, twenty million, two hundred twelve thousand, three hundred twenty-one".