12321111 has 16 divisors (see below), whose sum is σ = 18407808. Its totient is φ = 7264800.

The previous prime is 12321083. The next prime is 12321121. The reversal of 12321111 is 11112321.

It is not a de Polignac number, because 12321111 - 2⁷ = 12320983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12321121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3825 + ... + 6266.

It is an arithmetic number, because the mean of its divisors is an integer number (1150488).

Almost surely, 2^12321111 is an apocalyptic number.

12321111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12321111 is a deficient number, since it is larger than the sum of its proper divisors (6086697).

12321111 is a wasteful number, since it uses less digits than its factorization.

12321111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10142.

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

The square root of 12321111 is about 3510.1440141396. The cubic root of 12321111 is about 230.9670123994.

Adding to 12321111 its reverse (11112321), we get a palindrome (23433432).

It can be divided in two parts, 12321 and 111, that multiplied together give a palindrome (1367631).

The spelling of 12321111 in words is "twelve million, three hundred twenty-one thousand, one hundred eleven".