231321320033 has 2 divisors, whose sum is σ = 231321320034. Its totient is φ = 231321320032.

The previous prime is 231321320003. The next prime is 231321320039. The reversal of 231321320033 is 330023123132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127861310929 + 103460009104 = 357577^2 + 321652^2 .

It is a cyclic number.

It is not a de Polignac number, because 231321320033 - 2¹⁸ = 231321057889 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 231321319990 and 231321320008.

It is not a weakly prime, because it can be changed into another prime (231321320039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115660660016 + 115660660017.

It is an arithmetic number, because the mean of its divisors is an integer number (115660660017).

Almost surely, 2^231321320033 is an apocalyptic number.

It is an amenable number.

231321320033 is a deficient number, since it is larger than the sum of its proper divisors (1).

231321320033 is an equidigital number, since it uses as much as digits as its factorization.

231321320033 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 231321320033 its reverse (330023123132), we get a palindrome (561344443165).

The spelling of 231321320033 in words is "two hundred thirty-one billion, three hundred twenty-one million, three hundred twenty thousand, thirty-three".