130112021 has 4 divisors (see below), whose sum is σ = 140120652. Its totient is φ = 120103392.

The previous prime is 130111997. The next prime is 130112041. The reversal of 130112021 is 120211031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120211031 = 229 ⋅524939.

It can be written as a sum of positive squares in 2 ways, for example, as 78127921 + 51984100 = 8839^2 + 7210^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-130112021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 130111993 and 130112011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130112041) 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 in 3 ways as a sum of consecutive naturals, for example, 5004296 + ... + 5004321.

It is an arithmetic number, because the mean of its divisors is an integer number (35030163).

Almost surely, 2^130112021 is an apocalyptic number.

It is an amenable number.

130112021 is a deficient number, since it is larger than the sum of its proper divisors (10008631).

130112021 is a wasteful number, since it uses less digits than its factorization.

130112021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10008630.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 130112021 is about 11406.6656390025. The cubic root of 130112021 is about 506.7251667121.

Adding to 130112021 its reverse (120211031), we get a palindrome (250323052).

The spelling of 130112021 in words is "one hundred thirty million, one hundred twelve thousand, twenty-one".