12117177671621 has 8 divisors (see below), whose sum is σ = 13220074488288. Its totient is φ = 11014503390000.

The previous prime is 12117177671587. The next prime is 12117177671663. The reversal of 12117177671621 is 12617677171121.

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

It is not a de Polignac number, because 12117177671621 - 2¹⁰ = 12117177670597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12117177671621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12117177671671) 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 7 ways as a sum of consecutive naturals, for example, 55519895 + ... + 55737716.

It is an arithmetic number, because the mean of its divisors is an integer number (1652509311036).

Almost surely, 2^{12117177671621} is an apocalyptic number.

12117177671621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12117177671621 is a deficient number, since it is larger than the sum of its proper divisors (1102896816667).

12117177671621 is a wasteful number, since it uses less digits than its factorization.

12117177671621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111267523.

The product of its digits is 345744, while the sum is 50.

The spelling of 12117177671621 in words is "twelve trillion, one hundred seventeen billion, one hundred seventy-seven million, six hundred seventy-one thousand, six hundred twenty-one".