10117221605 has 4 divisors (see below), whose sum is σ = 12140665932. Its totient is φ = 8093777280.

The previous prime is 10117221601. The next prime is 10117221617. The reversal of 10117221605 is 50612271101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50612271101 = 7 ⋅7230324443.

It can be written as a sum of positive squares in 2 ways, for example, as 2080636996 + 8036584609 = 45614^2 + 89647^2 .

It is not a de Polignac number, because 10117221605 - 2² = 10117221601 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10117221601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1011722156 + ... + 1011722165.

It is an arithmetic number, because the mean of its divisors is an integer number (3035166483).

Almost surely, 2^10117221605 is an apocalyptic number.

It is an amenable number.

10117221605 is a deficient number, since it is larger than the sum of its proper divisors (2023444327).

10117221605 is an equidigital number, since it uses as much as digits as its factorization.

10117221605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2023444326.

The product of its (nonzero) digits is 840, while the sum is 26.

Adding to 10117221605 its reverse (50612271101), we get a palindrome (60729492706).

The spelling of 10117221605 in words is "ten billion, one hundred seventeen million, two hundred twenty-one thousand, six hundred five".