130021 has 2 divisors, whose sum is σ = 130022.
Its totient is φ = 130020.
The previous prime is 130003. The next prime is 130027. The reversal of 130021 is 120031.
130021 is nontrivially palindromic in base 14.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 72900 + 57121 = 270^2 + 239^2
It is a cyclic number.
It is not a de Polignac number, because 130021 - 27 = 129893 is a prime.
It is a junction number, because it is equal to n+sod(n) for n = 129986 and 130013.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (130027) 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, 65010 + 65011.
It is an arithmetic number, because the mean of its divisors is an integer number (65011).
2130021 is an apocalyptic number.
It is an amenable number.
130021 is a deficient number, since it is larger than the sum of its proper divisors (1).
130021 is an equidigital number, since it uses as much as digits as its factorization.
130021 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 6, while the sum is 7.
The square root of 130021 is about 360.5842481307.
The cubic root of 130021 is about 50.6606977810.
Adding to 130021 its reverse (120031), we get a palindrome (250052).
The spelling of 130021 in words is "one hundred thirty thousand, twenty-one".