202120320401 has 2 divisors, whose sum is σ = 202120320402. Its totient is φ = 202120320400.

The previous prime is 202120320397. The next prime is 202120320439. The reversal of 202120320401 is 104023021202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199674028801 + 2446291600 = 446849^2 + 49460^2 .

It is a cyclic number.

It is not a de Polignac number, because 202120320401 - 2² = 202120320397 is a prime.

It is a Sophie Germain prime.

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 202120320401.

It is not a weakly prime, because it can be changed into another prime (202120320901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101060160200 + 101060160201.

It is an arithmetic number, because the mean of its divisors is an integer number (101060160201).

Almost surely, 2^202120320401 is an apocalyptic number.

It is an amenable number.

202120320401 is a deficient number, since it is larger than the sum of its proper divisors (1).

202120320401 is an equidigital number, since it uses as much as digits as its factorization.

202120320401 is an odious number, because the sum of its binary digits is odd.

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

Adding to 202120320401 its reverse (104023021202), we get a palindrome (306143341603).

The spelling of 202120320401 in words is "two hundred two billion, one hundred twenty million, three hundred twenty thousand, four hundred one".