12171141603506 has 16 divisors (see below), whose sum is σ = 18302027345280. Its totient is φ = 6070480802640.

The previous prime is 12171141603499. The next prime is 12171141603631. The reversal of 12171141603506 is 60530614117121.

It is a super-2 number, since 2×12171141603506² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12171141603506.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2118890 + ... + 5369541.

It is an arithmetic number, because the mean of its divisors is an integer number (1143876709080).

Almost surely, 2^{12171141603506} is an apocalyptic number.

12171141603506 is a deficient number, since it is larger than the sum of its proper divisors (6130885741774).

12171141603506 is a wasteful number, since it uses less digits than its factorization.

12171141603506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7490449.

The product of its (nonzero) digits is 30240, while the sum is 38.

The spelling of 12171141603506 in words is "twelve trillion, one hundred seventy-one billion, one hundred forty-one million, six hundred three thousand, five hundred six".