12112321 has 8 divisors (see below), whose sum is σ = 13139840. Its totient is φ = 11098512.

The previous prime is 12112319. The next prime is 12112333. The reversal of 12112321 is 12321121.

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

It is a cyclic number.

It is not a de Polignac number, because 12112321 - 2¹ = 12112319 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12112361) 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 7 ways as a sum of consecutive naturals, for example, 1545 + ... + 5158.

It is an arithmetic number, because the mean of its divisors is an integer number (1642480).

Almost surely, 2^12112321 is an apocalyptic number.

It is an amenable number.

12112321 is a deficient number, since it is larger than the sum of its proper divisors (1027519).

12112321 is a wasteful number, since it uses less digits than its factorization.

12112321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6855.

The product of its digits is 24, while the sum is 13.

The square root of 12112321 is about 3480.2759948027. The cubic root of 12112321 is about 229.6549394139.

Adding to 12112321 its reverse (12321121), we get a palindrome (24433442).

It can be divided in two parts, 121 and 12321, that multiplied together give a square (1490841 = 1221²).

The spelling of 12112321 in words is "twelve million, one hundred twelve thousand, three hundred twenty-one".