120520121 has 2 divisors, whose sum is σ = 120520122. Its totient is φ = 120520120.

The previous prime is 120520087. The next prime is 120520189. The reversal of 120520121 is 121025021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78074896 + 42445225 = 8836^2 + 6515^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120520121 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 120520096 and 120520105.

It is not a weakly prime, because it can be changed into another prime (120520321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60260060 + 60260061.

It is an arithmetic number, because the mean of its divisors is an integer number (60260061).

Almost surely, 2^120520121 is an apocalyptic number.

It is an amenable number.

120520121 is a deficient number, since it is larger than the sum of its proper divisors (1).

120520121 is an equidigital number, since it uses as much as digits as its factorization.

120520121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 120520121 is about 10978.1656482310. The cubic root of 120520121 is about 493.9540147986.

Adding to 120520121 its reverse (121025021), we get a palindrome (241545142).

The spelling of 120520121 in words is "one hundred twenty million, five hundred twenty thousand, one hundred twenty-one".