231123321133 has 4 divisors (see below), whose sum is σ = 231128067868. Its totient is φ = 231118574400.

The previous prime is 231123321113. The next prime is 231123321167. The reversal of 231123321133 is 331123321132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4534944964 + 226588376169 = 67342^2 + 476013^2 .

It is a cyclic number.

It is not a de Polignac number, because 231123321133 - 2⁵ = 231123321101 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231123321098 and 231123321107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231123321113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2299566 + ... + 2397967.

It is an arithmetic number, because the mean of its divisors is an integer number (57782016967).

Almost surely, 2^231123321133 is an apocalyptic number.

It is an amenable number.

231123321133 is a deficient number, since it is larger than the sum of its proper divisors (4746735).

231123321133 is an equidigital number, since it uses as much as digits as its factorization.

231123321133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4746734.

The product of its digits is 1944, while the sum is 25.

Adding to 231123321133 its reverse (331123321132), we get a palindrome (562246642265).

Subtracting 231123321133 from its reverse (331123321132), we obtain a palindrome (99999999999).

The spelling of 231123321133 in words is "two hundred thirty-one billion, one hundred twenty-three million, three hundred twenty-one thousand, one hundred thirty-three".