12005321355 has 48 divisors (see below), whose sum is σ = 21138814944. Its totient is φ = 6302200320.

The previous prime is 12005321353. The next prime is 12005321369. The reversal of 12005321355 is 55312350021.

It is a happy number.

12005321355 is a `hidden beast` number, since 120 + 0 + 532 + 1 + 3 + 5 + 5 = 666.

12005321355 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 12005321355 - 2¹ = 12005321353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12005321353) 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 47 ways as a sum of consecutive naturals, for example, 748015 + ... + 763895.

It is an arithmetic number, because the mean of its divisors is an integer number (440391978).

Almost surely, 2^12005321355 is an apocalyptic number.

12005321355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12005321355 is a deficient number, since it is larger than the sum of its proper divisors (9133493589).

12005321355 is a wasteful number, since it uses less digits than its factorization.

12005321355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16156 (or 16153 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

Adding to 12005321355 its reverse (55312350021), we get a palindrome (67317671376).

The spelling of 12005321355 in words is "twelve billion, five million, three hundred twenty-one thousand, three hundred fifty-five".