12331111 has 4 divisors (see below), whose sum is σ = 13279672. Its totient is φ = 11382552.

The previous prime is 12331097. The next prime is 12331127. The reversal of 12331111 is 11113321.

12331111 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 12331111 - 2¹⁵ = 12298343 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 948547 = 12331111 / (1 + 2 + 3 + 3 + 1 + 1 + 1 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12331091 and 12331100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12331141) 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, 474261 + ... + 474286.

It is an arithmetic number, because the mean of its divisors is an integer number (3319918).

Almost surely, 2^12331111 is an apocalyptic number.

12331111 is a deficient number, since it is larger than the sum of its proper divisors (948561).

12331111 is an equidigital number, since it uses as much as digits as its factorization.

12331111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 948560.

The product of its digits is 18, while the sum is 13.

The square root of 12331111 is about 3511.5681682120. The cubic root of 12331111 is about 231.0294809422.

Adding to 12331111 its reverse (11113321), we get a palindrome (23444432).

The spelling of 12331111 in words is "twelve million, three hundred thirty-one thousand, one hundred eleven".