130330021 has 16 divisors (see below), whose sum is σ = 139790448. Its totient is φ = 121305600.

The previous prime is 130330009. The next prime is 130330037. The reversal of 130330021 is 120033031.

It can be written as a sum of positive squares in 8 ways, for example, as 5225796 + 125104225 = 2286^2 + 11185^2 .

It is a cyclic number.

It is not a de Polignac number, because 130330021 - 2²¹ = 128232869 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 130329983 and 130330010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130330001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79591 + ... + 81211.

It is an arithmetic number, because the mean of its divisors is an integer number (8736903).

Almost surely, 2^130330021 is an apocalyptic number.

It is an amenable number.

130330021 is a deficient number, since it is larger than the sum of its proper divisors (9460427).

130330021 is a wasteful number, since it uses less digits than its factorization.

130330021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1752.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 130330021 is about 11416.2174558827. The cubic root of 130330021 is about 507.0080113161.

Adding to 130330021 its reverse (120033031), we get a palindrome (250363052).

The spelling of 130330021 in words is "one hundred thirty million, three hundred thirty thousand, twenty-one".