12040002321 has 4 divisors (see below), whose sum is σ = 16053336432. Its totient is φ = 8026668212.

The previous prime is 12040002319. The next prime is 12040002323. The reversal of 12040002321 is 12320004021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (12040002319) and next prime (12040002323).

It is a cyclic number.

It is not a de Polignac number, because 12040002321 - 2¹ = 12040002319 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12040002321.

It is not an unprimeable number, because it can be changed into a prime (12040002323) 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, 2006667051 + ... + 2006667056.

It is an arithmetic number, because the mean of its divisors is an integer number (4013334108).

Almost surely, 2^12040002321 is an apocalyptic number.

It is an amenable number.

12040002321 is a deficient number, since it is larger than the sum of its proper divisors (4013334111).

12040002321 is an equidigital number, since it uses as much as digits as its factorization.

12040002321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4013334110.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 12040002321 its reverse (12320004021), we get a palindrome (24360006342).

The spelling of 12040002321 in words is "twelve billion, forty million, two thousand, three hundred twenty-one".