120420217 has 2 divisors, whose sum is σ = 120420218. Its totient is φ = 120420216.

The previous prime is 120420211. The next prime is 120420221. The reversal of 120420217 is 712024021.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118613881 + 1806336 = 10891^2 + 1344^2 .

It is a cyclic number.

It is not a de Polignac number, because 120420217 - 2¹⁹ = 119895929 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 120420194 and 120420203.

It is not a weakly prime, because it can be changed into another prime (120420211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60210108 + 60210109.

It is an arithmetic number, because the mean of its divisors is an integer number (60210109).

Almost surely, 2^120420217 is an apocalyptic number.

It is an amenable number.

120420217 is a deficient number, since it is larger than the sum of its proper divisors (1).

120420217 is an equidigital number, since it uses as much as digits as its factorization.

120420217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 120420217 is about 10973.6145822605. The cubic root of 120420217 is about 493.8174909184.

Adding to 120420217 its reverse (712024021), we get a palindrome (832444238).

The spelling of 120420217 in words is "one hundred twenty million, four hundred twenty thousand, two hundred seventeen".