12005506217522 has 8 divisors (see below), whose sum is σ = 18629233785900. Its totient is φ = 5795761622224.

The previous prime is 12005506217489. The next prime is 12005506217563. The reversal of 12005506217522 is 22571260550021.

It can be written as a sum of positive squares in 2 ways, for example, as 10848136909801 + 1157369307721 = 3293651^2 + 1075811^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103495743197 + ... + 103495743312.

Almost surely, 2^{12005506217522} is an apocalyptic number.

12005506217522 is a deficient number, since it is larger than the sum of its proper divisors (6623727568378).

12005506217522 is a wasteful number, since it uses less digits than its factorization.

12005506217522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206991486540.

The product of its (nonzero) digits is 84000, while the sum is 38.

Adding to 12005506217522 its reverse (22571260550021), we get a palindrome (34576766767543).

The spelling of 12005506217522 in words is "twelve trillion, five billion, five hundred six million, two hundred seventeen thousand, five hundred twenty-two".