201320021321 has 2 divisors, whose sum is σ = 201320021322. Its totient is φ = 201320021320.

The previous prime is 201320021257. The next prime is 201320021327. The reversal of 201320021321 is 123120023102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106618575625 + 94701445696 = 326525^2 + 307736^2 .

It is a cyclic number.

It is not a de Polignac number, because 201320021321 - 2⁶ = 201320021257 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201320021321.

It is not a weakly prime, because it can be changed into another prime (201320021327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100660010660 + 100660010661.

It is an arithmetic number, because the mean of its divisors is an integer number (100660010661).

Almost surely, 2^201320021321 is an apocalyptic number.

It is an amenable number.

201320021321 is a deficient number, since it is larger than the sum of its proper divisors (1).

201320021321 is an equidigital number, since it uses as much as digits as its factorization.

201320021321 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 201320021321 its reverse (123120023102), we get a palindrome (324440044423).

The spelling of 201320021321 in words is "two hundred one billion, three hundred twenty million, twenty-one thousand, three hundred twenty-one".