12312111 has 8 divisors (see below), whose sum is σ = 18761344. Its totient is φ = 7035480.

The previous prime is 12312109. The next prime is 12312119. The reversal of 12312111 is 11121321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12312111 - 2¹ = 12312109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12312119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 293125 + ... + 293166.

It is an arithmetic number, because the mean of its divisors is an integer number (2345168).

Almost surely, 2^12312111 is an apocalyptic number.

12312111 is a deficient number, since it is larger than the sum of its proper divisors (6449233).

12312111 is an equidigital number, since it uses as much as digits as its factorization.

12312111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586301.

The product of its digits is 12, while the sum is 12.

The square root of 12312111 is about 3508.8617812618. The cubic root of 12312111 is about 230.9107618050.

Adding to 12312111 its reverse (11121321), we get a palindrome (23433432).

The spelling of 12312111 in words is "twelve million, three hundred twelve thousand, one hundred eleven".