12117011665 has 8 divisors (see below), whose sum is σ = 15862269888. Its totient is φ = 8812372080.

The previous prime is 12117011603. The next prime is 12117011671. The reversal of 12117011665 is 56611071121.

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

It is a de Polignac number, because none of the positive numbers 2^k-12117011665 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110154597 + ... + 110154706.

It is an arithmetic number, because the mean of its divisors is an integer number (1982783736).

Almost surely, 2^12117011665 is an apocalyptic number.

It is an amenable number.

12117011665 is a deficient number, since it is larger than the sum of its proper divisors (3745258223).

12117011665 is a wasteful number, since it uses less digits than its factorization.

12117011665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220309319.

The product of its (nonzero) digits is 2520, while the sum is 31.

Adding to 12117011665 its reverse (56611071121), we get a palindrome (68728082786).

The spelling of 12117011665 in words is "twelve billion, one hundred seventeen million, eleven thousand, six hundred sixty-five".