12005521332242 has 16 divisors (see below), whose sum is σ = 18011838960792. Its totient is φ = 6001575148800.

The previous prime is 12005521332197. The next prime is 12005521332251. The reversal of 12005521332242 is 24223312550021.

It can be written as a sum of positive squares in 4 ways, for example, as 10356354260641 + 1649167071601 = 3218129^2 + 1284199^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12005521332199 and 12005521332208.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 266452988 + ... + 266498040.

Almost surely, 2^{12005521332242} is an apocalyptic number.

12005521332242 is a deficient number, since it is larger than the sum of its proper divisors (6006317628550).

12005521332242 is a wasteful number, since it uses less digits than its factorization.

12005521332242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68413.

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 12005521332242 its reverse (24223312550021), we get a palindrome (36228833882263).

The spelling of 12005521332242 in words is "twelve trillion, five billion, five hundred twenty-one million, three hundred thirty-two thousand, two hundred forty-two".