102120017 has 2 divisors, whose sum is σ = 102120018. Its totient is φ = 102120016.

The previous prime is 102120013. The next prime is 102120043. The reversal of 102120017 is 710021201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58507201 + 43612816 = 7649^2 + 6604^2 .

It is a cyclic number.

It is not a de Polignac number, because 102120017 - 2² = 102120013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102119983 and 102120010.

It is not a weakly prime, because it can be changed into another prime (102120013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51060008 + 51060009.

It is an arithmetic number, because the mean of its divisors is an integer number (51060009).

Almost surely, 2^102120017 is an apocalyptic number.

It is an amenable number.

102120017 is a deficient number, since it is larger than the sum of its proper divisors (1).

102120017 is an equidigital number, since it uses as much as digits as its factorization.

102120017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28, while the sum is 14.

The square root of 102120017 is about 10105.4449184586. Note that the first 3 decimals coincide. The cubic root of 102120017 is about 467.4160555427.

Adding to 102120017 its reverse (710021201), we get a palindrome (812141218).

The spelling of 102120017 in words is "one hundred two million, one hundred twenty thousand, seventeen".