120660217 has 2 divisors, whose sum is σ = 120660218. Its totient is φ = 120660216.

The previous prime is 120660187. The next prime is 120660223. The reversal of 120660217 is 712066021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117917881 + 2742336 = 10859^2 + 1656^2 .

It is a cyclic number.

It is not a de Polignac number, because 120660217 - 2²³ = 112271609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120660191 and 120660200.

It is not a weakly prime, because it can be changed into another prime (120660227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60330108 + 60330109.

It is an arithmetic number, because the mean of its divisors is an integer number (60330109).

Almost surely, 2^120660217 is an apocalyptic number.

It is an amenable number.

120660217 is a deficient number, since it is larger than the sum of its proper divisors (1).

120660217 is an equidigital number, since it uses as much as digits as its factorization.

120660217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 120660217 is about 10984.5444602860. The cubic root of 120660217 is about 494.1453360615.

The spelling of 120660217 in words is "one hundred twenty million, six hundred sixty thousand, two hundred seventeen".