12013022321 has 8 divisors (see below), whose sum is σ = 12429258600. Its totient is φ = 11596919040.

The previous prime is 12013022317. The next prime is 12013022363. The reversal of 12013022321 is 12322031021.

It can be written as a sum of positive squares in 4 ways, for example, as 856381696 + 11156640625 = 29264^2 + 105625^2 .

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

It is not a de Polignac number, because 12013022321 - 2² = 12013022317 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12013022321.

It is not an unprimeable number, because it can be changed into a prime (12013022311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172115 + ... + 231623.

It is an arithmetic number, because the mean of its divisors is an integer number (1553657325).

Almost surely, 2^12013022321 is an apocalyptic number.

It is an amenable number.

12013022321 is a deficient number, since it is larger than the sum of its proper divisors (416236279).

12013022321 is an equidigital number, since it uses as much as digits as its factorization.

12013022321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66499.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 12013022321 its reverse (12322031021), we get a palindrome (24335053342).

The spelling of 12013022321 in words is "twelve billion, thirteen million, twenty-two thousand, three hundred twenty-one".