10203221321 has 2 divisors, whose sum is σ = 10203221322. Its totient is φ = 10203221320.

The previous prime is 10203221311. The next prime is 10203221323. The reversal of 10203221321 is 12312230201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6317070400 + 3886150921 = 79480^2 + 62339^2 .

It is a cyclic number.

It is not a de Polignac number, because 10203221321 - 2⁶ = 10203221257 is a prime.

Together with 10203221323, 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 10203221321.

It is not a weakly prime, because it can be changed into another prime (10203221323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5101610660 + 5101610661.

It is an arithmetic number, because the mean of its divisors is an integer number (5101610661).

Almost surely, 2^10203221321 is an apocalyptic number.

It is an amenable number.

10203221321 is a deficient number, since it is larger than the sum of its proper divisors (1).

10203221321 is an equidigital number, since it uses as much as digits as its factorization.

10203221321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 10203221321 its reverse (12312230201), we get a palindrome (22515451522).

The spelling of 10203221321 in words is "ten billion, two hundred three million, two hundred twenty-one thousand, three hundred twenty-one".