14515121321 has 2 divisors, whose sum is σ = 14515121322. Its totient is φ = 14515121320.

The previous prime is 14515121317. The next prime is 14515121329. The reversal of 14515121321 is 12312151541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13303315600 + 1211805721 = 115340^2 + 34811^2 .

It is an emirp because it is prime and its reverse (12312151541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 14515121321 - 2² = 14515121317 is a prime.

It is not a weakly prime, because it can be changed into another prime (14515121329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7257560660 + 7257560661.

It is an arithmetic number, because the mean of its divisors is an integer number (7257560661).

Almost surely, 2^14515121321 is an apocalyptic number.

It is an amenable number.

14515121321 is a deficient number, since it is larger than the sum of its proper divisors (1).

14515121321 is an equidigital number, since it uses as much as digits as its factorization.

14515121321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1200, while the sum is 26.

Adding to 14515121321 its reverse (12312151541), we get a palindrome (26827272862).

The spelling of 14515121321 in words is "fourteen billion, five hundred fifteen million, one hundred twenty-one thousand, three hundred twenty-one".