123120017 has 2 divisors, whose sum is σ = 123120018. Its totient is φ = 123120016.

The previous prime is 123120013. The next prime is 123120029. The reversal of 123120017 is 710021321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73685056 + 49434961 = 8584^2 + 7031^2 .

It is a cyclic number.

It is not a de Polignac number, because 123120017 - 2² = 123120013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123119977 and 123120004.

It is not a weakly prime, because it can be changed into another prime (123120013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61560008 + 61560009.

It is an arithmetic number, because the mean of its divisors is an integer number (61560009).

Almost surely, 2^123120017 is an apocalyptic number.

It is an amenable number.

123120017 is a deficient number, since it is larger than the sum of its proper divisors (1).

123120017 is an equidigital number, since it uses as much as digits as its factorization.

123120017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 123120017 is about 11095.9459713897. The cubic root of 123120017 is about 497.4806834078.

Adding to 123120017 its reverse (710021321), we get a palindrome (833141338).

The spelling of 123120017 in words is "one hundred twenty-three million, one hundred twenty thousand, seventeen".