122217665 has 4 divisors (see below), whose sum is σ = 146661204. Its totient is φ = 97774128.

The previous prime is 122217659. The next prime is 122217677. The reversal of 122217665 is 566712221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17032129 + 105185536 = 4127^2 + 10256^2 .

It is a cyclic number.

It is not a de Polignac number, because 122217665 - 2²⁰ = 121169089 is a prime.

It is a Duffinian 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, 12221762 + ... + 12221771.

It is an arithmetic number, because the mean of its divisors is an integer number (36665301).

Almost surely, 2^122217665 is an apocalyptic number.

It is an amenable number.

122217665 is a deficient number, since it is larger than the sum of its proper divisors (24443539).

122217665 is an equidigital number, since it uses as much as digits as its factorization.

122217665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24443538.

The product of its digits is 10080, while the sum is 32.

The square root of 122217665 is about 11055.2098578001. The cubic root of 122217665 is about 496.2623495585.

Adding to 122217665 its reverse (566712221), we get a palindrome (688929886).

The spelling of 122217665 in words is "one hundred twenty-two million, two hundred seventeen thousand, six hundred sixty-five".