12321013 has 4 divisors (see below), whose sum is σ = 12489868. Its totient is φ = 12152160.

The previous prime is 12321011. The next prime is 12321017. The reversal of 12321013 is 31012321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2125764 + 10195249 = 1458^2 + 3193^2 .

It is a cyclic number.

It is not a de Polignac number, because 12321013 - 2¹ = 12321011 is a prime.

It is a super-2 number, since 2×12321013² = 303614722692338, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12320984 and 12321002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12321011) 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 3 ways as a sum of consecutive naturals, for example, 84318 + ... + 84463.

It is an arithmetic number, because the mean of its divisors is an integer number (3122467).

Almost surely, 2^12321013 is an apocalyptic number.

It is an amenable number.

12321013 is a deficient number, since it is larger than the sum of its proper divisors (168855).

12321013 is an equidigital number, since it uses as much as digits as its factorization.

12321013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168854.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 12321013 is about 3510.1300545706. The cubic root of 12321013 is about 230.9664000404.

Adding to 12321013 its reverse (31012321), we get a palindrome (43333334).

The spelling of 12321013 in words is "twelve million, three hundred twenty-one thousand, thirteen".