12015222321 has 16 divisors (see below), whose sum is σ = 16081058880. Its totient is φ = 7979811840.

The previous prime is 12015222281. The next prime is 12015222367. The reversal of 12015222321 is 12322251021.

12015222321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12015222321 - 2⁶ = 12015222257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12015222221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1235245 + ... + 1244933.

It is an arithmetic number, because the mean of its divisors is an integer number (1005066180).

Almost surely, 2^12015222321 is an apocalyptic number.

It is an amenable number.

12015222321 is a deficient number, since it is larger than the sum of its proper divisors (4065836559).

12015222321 is a wasteful number, since it uses less digits than its factorization.

12015222321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11216.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 12015222321 its reverse (12322251021), we get a palindrome (24337473342).

The spelling of 12015222321 in words is "twelve billion, fifteen million, two hundred twenty-two thousand, three hundred twenty-one".