12117220338542 has 8 divisors (see below), whose sum is σ = 19828178735832. Its totient is φ = 5507827426600.

The previous prime is 12117220338533. The next prime is 12117220338563. The reversal of 12117220338542 is 24583302271121.

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

It is a self number, because there is not a number n which added to its sum of digits gives 12117220338542.

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, 275391371309 + ... + 275391371352.

It is an arithmetic number, because the mean of its divisors is an integer number (2478522341979).

Almost surely, 2^{12117220338542} is an apocalyptic number.

12117220338542 is a deficient number, since it is larger than the sum of its proper divisors (7710958397290).

12117220338542 is a wasteful number, since it uses less digits than its factorization.

12117220338542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550782742674.

The product of its (nonzero) digits is 161280, while the sum is 41.

The spelling of 12117220338542 in words is "twelve trillion, one hundred seventeen billion, two hundred twenty million, three hundred thirty-eight thousand, five hundred forty-two".