12151321 has 16 divisors (see below), whose sum is σ = 15186304. Its totient is φ = 9465984.

The previous prime is 12151297. The next prime is 12151343. The reversal of 12151321 is 12315121.

12151321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12151321 - 2⁵ = 12151289 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12151295 and 12151304.

It is not an unprimeable number, because it can be changed into a prime (12151351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5101 + ... + 7093.

It is an arithmetic number, because the mean of its divisors is an integer number (949144).

Almost surely, 2^12151321 is an apocalyptic number.

It is an amenable number.

12151321 is a deficient number, since it is larger than the sum of its proper divisors (3034983).

12151321 is a wasteful number, since it uses less digits than its factorization.

12151321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2080.

The product of its digits is 60, while the sum is 16.

The square root of 12151321 is about 3485.8744957327. The cubic root of 12151321 is about 229.9011610603.

Adding to 12151321 its reverse (12315121), we get a palindrome (24466442).

The spelling of 12151321 in words is "twelve million, one hundred fifty-one thousand, three hundred twenty-one".