130323021 has 4 divisors (see below), whose sum is σ = 173764032. Its totient is φ = 86882012.

The previous prime is 130323019. The next prime is 130323043. The reversal of 130323021 is 120323031.

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.

It is a cyclic number.

It is not a de Polignac number, because 130323021 - 2¹ = 130323019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130323091) 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, 21720501 + ... + 21720506.

It is an arithmetic number, because the mean of its divisors is an integer number (43441008).

Almost surely, 2^130323021 is an apocalyptic number.

It is an amenable number.

130323021 is a deficient number, since it is larger than the sum of its proper divisors (43441011).

130323021 is an equidigital number, since it uses as much as digits as its factorization.

130323021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43441010.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 130323021 is about 11415.9108703598. The cubic root of 130323021 is about 506.9989340531.

Adding to 130323021 its reverse (120323031), we get a palindrome (250646052).

The spelling of 130323021 in words is "one hundred thirty million, three hundred twenty-three thousand, twenty-one".