130600021 has 8 divisors (see below), whose sum is σ = 135268920. Its totient is φ = 125942208.

The previous prime is 130600013. The next prime is 130600031. The reversal of 130600021 is 120006031.

It can be written as a sum of positive squares in 4 ways, for example, as 7700625 + 122899396 = 2775^2 + 11086^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 130600021 - 2³ = 130600013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 130599974 and 130600010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130600031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26655 + ... + 31171.

It is an arithmetic number, because the mean of its divisors is an integer number (16908615).

Almost surely, 2^130600021 is an apocalyptic number.

It is an amenable number.

130600021 is a deficient number, since it is larger than the sum of its proper divisors (4668899).

130600021 is an equidigital number, since it uses as much as digits as its factorization.

130600021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5543.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 130600021 is about 11428.0366205224. The cubic root of 130600021 is about 507.3578865511.

Adding to 130600021 its reverse (120006031), we get a palindrome (250606052).

The spelling of 130600021 in words is "one hundred thirty million, six hundred thousand, twenty-one".