130010021 has 4 divisors (see below), whose sum is σ = 130042272. Its totient is φ = 129977772.

The previous prime is 130010009. The next prime is 130010047. The reversal of 130010021 is 120010031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 120010031 = 859 ⋅139709.

It is a cyclic number.

It is not a de Polignac number, because 130010021 - 2¹⁴ = 129993637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 130009990 and 130010008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130010821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9041 + ... + 18486.

It is an arithmetic number, because the mean of its divisors is an integer number (32510568).

Almost surely, 2^130010021 is an apocalyptic number.

It is an amenable number.

130010021 is a deficient number, since it is larger than the sum of its proper divisors (32251).

130010021 is an equidigital number, since it uses as much as digits as its factorization.

130010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32250.

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 130010021 is about 11402.1936924436. The cubic root of 130010021 is about 506.5927180761.

Adding to 130010021 its reverse (120010031), we get a palindrome (250020052).

The spelling of 130010021 in words is "one hundred thirty million, ten thousand, twenty-one".