12321109 has 4 divisors (see below), whose sum is σ = 12328204. Its totient is φ = 12314016.

The previous prime is 12321083. The next prime is 12321121. The reversal of 12321109 is 90112321.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 8538084 + 3783025 = 2922^2 + 1945^2 .

It is a cyclic number.

It is not a de Polignac number, because 12321109 - 2¹¹ = 12319061 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 (12321149) 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, 1009 + ... + 5065.

It is an arithmetic number, because the mean of its divisors is an integer number (3082051).

Almost surely, 2^12321109 is an apocalyptic number.

It is an amenable number.

12321109 is a deficient number, since it is larger than the sum of its proper divisors (7095).

12321109 is an equidigital number, since it uses as much as digits as its factorization.

12321109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7094.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 12321109 is about 3510.1437292510. The cubic root of 12321109 is about 230.9669999023.

The spelling of 12321109 in words is "twelve million, three hundred twenty-one thousand, one hundred nine".