12321001 has 12 divisors (see below), whose sum is σ = 15636240. Its totient is φ = 9600360.

The previous prime is 12320999. The next prime is 12321011. The reversal of 12321001 is 10012321.

It is not a de Polignac number, because 12321001 - 2¹ = 12320999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12321011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10891 + ... + 11968.

It is an arithmetic number, because the mean of its divisors is an integer number (1303020).

Almost surely, 2^12321001 is an apocalyptic number.

12321001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12321001 is a deficient number, since it is larger than the sum of its proper divisors (3315239).

12321001 is a wasteful number, since it uses less digits than its factorization.

12321001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22884 (or 22877 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 12321001 is about 3510.1283452318. The cubic root of 12321001 is about 230.9663250575.

Adding to 12321001 its reverse (10012321), we get a palindrome (22333322).

The spelling of 12321001 in words is "twelve million, three hundred twenty-one thousand, one".