122615272217 has 4 divisors (see below), whose sum is σ = 122669745936. Its totient is φ = 122560798500.

The previous prime is 122615272211. The next prime is 122615272303. The reversal of 122615272217 is 712272516221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122615272217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122615272211) 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, 27233483 + ... + 27237984.

It is an arithmetic number, because the mean of its divisors is an integer number (30667436484).

Almost surely, 2^122615272217 is an apocalyptic number.

It is an amenable number.

122615272217 is a deficient number, since it is larger than the sum of its proper divisors (54473719).

122615272217 is an equidigital number, since it uses as much as digits as its factorization.

122615272217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54473718.

The product of its digits is 47040, while the sum is 38.

Adding to 122615272217 its reverse (712272516221), we get a palindrome (834887788438).

The spelling of 122615272217 in words is "one hundred twenty-two billion, six hundred fifteen million, two hundred seventy-two thousand, two hundred seventeen".