120565021 has 2 divisors, whose sum is σ = 120565022. Its totient is φ = 120565020.

The previous prime is 120565019. The next prime is 120565033.

120565021 is nontrivially palindromic in base 10.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104652900 + 15912121 = 10230^2 + 3989^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 120565021 - 2¹ = 120565019 is a prime.

Together with 120565019, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 120564983 and 120565001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120565001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60282510 + 60282511.

It is an arithmetic number, because the mean of its divisors is an integer number (60282511).

Almost surely, 2^120565021 is an apocalyptic number.

It is an amenable number.

120565021 is a deficient number, since it is larger than the sum of its proper divisors (1).

120565021 is an equidigital number, since it uses as much as digits as its factorization.

120565021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 120565021 is about 10980.2104260346. The cubic root of 120565021 is about 494.0153483514.

The spelling of 120565021 in words is "one hundred twenty million, five hundred sixty-five thousand, twenty-one".