12661316303321 has 16 divisors (see below), whose sum is σ = 14581128152448. Its totient is φ = 10769274297600.

The previous prime is 12661316303257. The next prime is 12661316303341. The reversal of 12661316303321 is 12330361316621.

It is not a de Polignac number, because 12661316303321 - 2⁶ = 12661316303257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12661316303341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23328881 + ... + 23865441.

It is an arithmetic number, because the mean of its divisors is an integer number (911320509528).

Almost surely, 2^{12661316303321} is an apocalyptic number.

It is an amenable number.

12661316303321 is a deficient number, since it is larger than the sum of its proper divisors (1919811849127).

12661316303321 is a wasteful number, since it uses less digits than its factorization.

12661316303321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562432.

The product of its (nonzero) digits is 69984, while the sum is 38.

Adding to 12661316303321 its reverse (12330361316621), we get a palindrome (24991677619942).

The spelling of 12661316303321 in words is "twelve trillion, six hundred sixty-one billion, three hundred sixteen million, three hundred three thousand, three hundred twenty-one".