122640347217 has 8 divisors (see below), whose sum is σ = 163522784320. Its totient is φ = 81759070800.

The previous prime is 122640347213. The next prime is 122640347231. The reversal of 122640347217 is 712743046221.

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

It is not a de Polignac number, because 122640347217 - 2² = 122640347213 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122640347213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3034 + ... + 495267.

It is an arithmetic number, because the mean of its divisors is an integer number (20440348040).

Almost surely, 2^122640347217 is an apocalyptic number.

It is an amenable number.

122640347217 is a deficient number, since it is larger than the sum of its proper divisors (40882437103).

122640347217 is an equidigital number, since it uses as much as digits as its factorization.

122640347217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580343.

The product of its (nonzero) digits is 112896, while the sum is 39.

The spelling of 122640347217 in words is "one hundred twenty-two billion, six hundred forty million, three hundred forty-seven thousand, two hundred seventeen".