130120321 has 4 divisors (see below), whose sum is σ = 130306644. Its totient is φ = 129934000.

The previous prime is 130120307. The next prime is 130120327. The reversal of 130120321 is 123021031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 44742721 + 85377600 = 6689^2 + 9240^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-130120321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (130120327) 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, 92110 + ... + 93511.

It is an arithmetic number, because the mean of its divisors is an integer number (32576661).

Almost surely, 2^130120321 is an apocalyptic number.

It is an amenable number.

130120321 is a deficient number, since it is larger than the sum of its proper divisors (186323).

130120321 is an equidigital number, since it uses as much as digits as its factorization.

130120321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186322.

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

The square root of 130120321 is about 11407.0294555594. The cubic root of 130120321 is about 506.7359413493.

Adding to 130120321 its reverse (123021031), we get a palindrome (253141352).

The spelling of 130120321 in words is "one hundred thirty million, one hundred twenty thousand, three hundred twenty-one".