202013212321 has 2 divisors, whose sum is σ = 202013212322. Its totient is φ = 202013212320.

The previous prime is 202013212319. The next prime is 202013212339. The reversal of 202013212321 is 123212310202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134275342096 + 67737870225 = 366436^2 + 260265^2 .

It is a cyclic number.

It is not a de Polignac number, because 202013212321 - 2¹ = 202013212319 is a prime.

Together with 202013212319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (202013212721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101006606160 + 101006606161.

It is an arithmetic number, because the mean of its divisors is an integer number (101006606161).

Almost surely, 2^202013212321 is an apocalyptic number.

It is an amenable number.

202013212321 is a deficient number, since it is larger than the sum of its proper divisors (1).

202013212321 is an equidigital number, since it uses as much as digits as its factorization.

202013212321 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 19.

Adding to 202013212321 its reverse (123212310202), we get a palindrome (325225522523).

The spelling of 202013212321 in words is "two hundred two billion, thirteen million, two hundred twelve thousand, three hundred twenty-one".