120520321 has 2 divisors, whose sum is σ = 120520322. Its totient is φ = 120520320.

The previous prime is 120520307. The next prime is 120520373. The reversal of 120520321 is 123025021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120450625 + 69696 = 10975^2 + 264^2 .

It is a cyclic number.

It is not a de Polignac number, because 120520321 - 2⁹ = 120519809 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120520295 and 120520304.

It is not a weakly prime, because it can be changed into another prime (120520381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60260160 + 60260161.

It is an arithmetic number, because the mean of its divisors is an integer number (60260161).

Almost surely, 2^120520321 is an apocalyptic number.

It is an amenable number.

120520321 is a deficient number, since it is larger than the sum of its proper divisors (1).

120520321 is an equidigital number, since it uses as much as digits as its factorization.

120520321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 120520321 is about 10978.1747572172. The cubic root of 120520321 is about 493.9542880331.

Adding to 120520321 its reverse (123025021), we get a palindrome (243545342).

The spelling of 120520321 in words is "one hundred twenty million, five hundred twenty thousand, three hundred twenty-one".