231123033311 has 4 divisors (see below), whose sum is σ = 231861445872. Its totient is φ = 230384620752.

The previous prime is 231123033307. The next prime is 231123033347. The reversal of 231123033311 is 113330321132.

231123033311 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 231123033311 - 2² = 231123033307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231123033611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 369205811 + ... + 369206436.

It is an arithmetic number, because the mean of its divisors is an integer number (57965361468).

Almost surely, 2^231123033311 is an apocalyptic number.

231123033311 is a deficient number, since it is larger than the sum of its proper divisors (738412561).

231123033311 is an equidigital number, since it uses as much as digits as its factorization.

231123033311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738412560.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 231123033311 its reverse (113330321132), we get a palindrome (344453354443).

The spelling of 231123033311 in words is "two hundred thirty-one billion, one hundred twenty-three million, thirty-three thousand, three hundred eleven".