12321350111605 has 4 divisors (see below), whose sum is σ = 14785620133932. Its totient is φ = 9857080089280.

The previous prime is 12321350111569. The next prime is 12321350111639. The reversal of 12321350111605 is 50611105312321.

12321350111605 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4104052015716 + 8217298095889 = 2025846^2 + 2866583^2 .

It is not a de Polignac number, because 12321350111605 - 2²¹ = 12321348014453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1232135011156 + ... + 1232135011165.

It is an arithmetic number, because the mean of its divisors is an integer number (3696405033483).

Almost surely, 2^{12321350111605} is an apocalyptic number.

It is an amenable number.

12321350111605 is a deficient number, since it is larger than the sum of its proper divisors (2464270022327).

12321350111605 is an equidigital number, since it uses as much as digits as its factorization.

12321350111605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2464270022326.

The product of its (nonzero) digits is 5400, while the sum is 31.

Adding to 12321350111605 its reverse (50611105312321), we get a palindrome (62932455423926).

The spelling of 12321350111605 in words is "twelve trillion, three hundred twenty-one billion, three hundred fifty million, one hundred eleven thousand, six hundred five".