120531217 has 2 divisors, whose sum is σ = 120531218. Its totient is φ = 120531216.

The previous prime is 120531211. The next prime is 120531223. The reversal of 120531217 is 712135021.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (120531211) and next prime (120531223).

It can be written as a sum of positive squares in only one way, i.e., 118352641 + 2178576 = 10879^2 + 1476^2 .

It is a cyclic number.

It is not a de Polignac number, because 120531217 - 2²³ = 112142609 is a prime.

It is not a weakly prime, because it can be changed into another prime (120531211) 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, 60265608 + 60265609.

It is an arithmetic number, because the mean of its divisors is an integer number (60265609).

Almost surely, 2^120531217 is an apocalyptic number.

It is an amenable number.

120531217 is a deficient number, since it is larger than the sum of its proper divisors (1).

120531217 is an equidigital number, since it uses as much as digits as its factorization.

120531217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 120531217 is about 10978.6710033592. The cubic root of 120531217 is about 493.9691733893.

Adding to 120531217 its reverse (712135021), we get a palindrome (832666238).

The spelling of 120531217 in words is "one hundred twenty million, five hundred thirty-one thousand, two hundred seventeen".