231330311111 has 12 divisors (see below), whose sum is σ = 241874334432. Its totient is φ = 221142995136.

The previous prime is 231330311081. The next prime is 231330311117. The reversal of 231330311111 is 111113033132.

It is not a de Polignac number, because 231330311111 - 2¹⁸ = 231330048967 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 (231330311117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1244066 + ... + 1417871.

It is an arithmetic number, because the mean of its divisors is an integer number (20156194536).

Almost surely, 2^231330311111 is an apocalyptic number.

231330311111 is a deficient number, since it is larger than the sum of its proper divisors (10544023321).

231330311111 is an equidigital number, since it uses as much as digits as its factorization.

231330311111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2662070 (or 2662027 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 20.

Adding to 231330311111 its reverse (111113033132), we get a palindrome (342443344243).

The spelling of 231330311111 in words is "two hundred thirty-one billion, three hundred thirty million, three hundred eleven thousand, one hundred eleven".