120021017 has 2 divisors, whose sum is σ = 120021018. Its totient is φ = 120021016.

The previous prime is 120020993. The next prime is 120021023. The reversal of 120021017 is 710120021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119333776 + 687241 = 10924^2 + 829^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120021017 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 120020992 and 120021010.

It is not a weakly prime, because it can be changed into another prime (120021067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60010508 + 60010509.

It is an arithmetic number, because the mean of its divisors is an integer number (60010509).

Almost surely, 2^120021017 is an apocalyptic number.

It is an amenable number.

120021017 is a deficient number, since it is larger than the sum of its proper divisors (1).

120021017 is an equidigital number, since it uses as much as digits as its factorization.

120021017 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 120021017 is about 10955.4103985200. The cubic root of 120021017 is about 493.2712089513.

Adding to 120021017 its reverse (710120021), we get a palindrome (830141038).

The spelling of 120021017 in words is "one hundred twenty million, twenty-one thousand, seventeen".