10117221665 has 8 divisors (see below), whose sum is σ = 12141218088. Its totient is φ = 8093409280.

The previous prime is 10117221649. The next prime is 10117221683. The reversal of 10117221665 is 56612271101.

It can be written as a sum of positive squares in 4 ways, for example, as 90003169 + 10027218496 = 9487^2 + 100136^2 .

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

It is not a de Polignac number, because 10117221665 - 2⁴ = 10117221649 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153935 + ... + 209595.

It is an arithmetic number, because the mean of its divisors is an integer number (1517652261).

Almost surely, 2^10117221665 is an apocalyptic number.

It is an amenable number.

10117221665 is a deficient number, since it is larger than the sum of its proper divisors (2023996423).

10117221665 is an equidigital number, since it uses as much as digits as its factorization.

10117221665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92019.

The product of its (nonzero) digits is 5040, while the sum is 32.

Adding to 10117221665 its reverse (56612271101), we get a palindrome (66729492766).

The spelling of 10117221665 in words is "ten billion, one hundred seventeen million, two hundred twenty-one thousand, six hundred sixty-five".