23203001321 has 2 divisors, whose sum is σ = 23203001322. Its totient is φ = 23203001320.

The previous prime is 23203001317. The next prime is 23203001323. The reversal of 23203001321 is 12310030232.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13606056025 + 9596945296 = 116645^2 + 97964^2 .

It is a cyclic number.

It is not a de Polignac number, because 23203001321 - 2² = 23203001317 is a prime.

Together with 23203001323, 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 23203001321.

It is not a weakly prime, because it can be changed into another prime (23203001323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11601500660 + 11601500661.

It is an arithmetic number, because the mean of its divisors is an integer number (11601500661).

Almost surely, 2^23203001321 is an apocalyptic number.

It is an amenable number.

23203001321 is a deficient number, since it is larger than the sum of its proper divisors (1).

23203001321 is an equidigital number, since it uses as much as digits as its factorization.

23203001321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 23203001321 its reverse (12310030232), we get a palindrome (35513031553).

The spelling of 23203001321 in words is "twenty-three billion, two hundred three million, one thousand, three hundred twenty-one".