130216321 has 4 divisors (see below), whose sum is σ = 130240944. Its totient is φ = 130191700.

The previous prime is 130216301. The next prime is 130216327. The reversal of 130216321 is 123612031.

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: 123612031 = 3433 ⋅36007.

It is a cyclic number.

It is not a de Polignac number, because 130216321 - 2⁹ = 130215809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (130216327) 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, 775 + ... + 16156.

It is an arithmetic number, because the mean of its divisors is an integer number (32560236).

Almost surely, 2^130216321 is an apocalyptic number.

It is an amenable number.

130216321 is a deficient number, since it is larger than the sum of its proper divisors (24623).

130216321 is an equidigital number, since it uses as much as digits as its factorization.

130216321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24622.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 130216321 is about 11411.2366113406. The cubic root of 130216321 is about 506.8605303743.

Adding to 130216321 its reverse (123612031), we get a palindrome (253828352).

The spelling of 130216321 in words is "one hundred thirty million, two hundred sixteen thousand, three hundred twenty-one".