23203331321 has 2 divisors, whose sum is σ = 23203331322. Its totient is φ = 23203331320.

The previous prime is 23203331309. The next prime is 23203331323. The reversal of 23203331321 is 12313330232.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20182180096 + 3021151225 = 142064^2 + 54965^2 .

It is a cyclic number.

It is not a de Polignac number, because 23203331321 - 2¹⁸ = 23203069177 is a prime.

Together with 23203331323, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23203331323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11601665660 + 11601665661.

It is an arithmetic number, because the mean of its divisors is an integer number (11601665661).

Almost surely, 2^23203331321 is an apocalyptic number.

It is an amenable number.

23203331321 is a deficient number, since it is larger than the sum of its proper divisors (1).

23203331321 is an equidigital number, since it uses as much as digits as its factorization.

23203331321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 23203331321 its reverse (12313330232), we get a palindrome (35516661553).

The spelling of 23203331321 in words is "twenty-three billion, two hundred three million, three hundred thirty-one thousand, three hundred twenty-one".