1301320321 has 4 divisors (see below), whose sum is σ = 1487223232. Its totient is φ = 1115417412.

The previous prime is 1301320313. The next prime is 1301320327. The reversal of 1301320321 is 1230231031.

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: 1230231031 = 6869 ⋅179099.

It is a cyclic number.

It is not a de Polignac number, because 1301320321 - 2³ = 1301320313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1301320295 and 1301320304.

It is not an unprimeable number, because it can be changed into a prime (1301320327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92951445 + ... + 92951458.

It is an arithmetic number, because the mean of its divisors is an integer number (371805808).

Almost surely, 2^1301320321 is an apocalyptic number.

It is an amenable number.

1301320321 is a deficient number, since it is larger than the sum of its proper divisors (185902911).

1301320321 is an equidigital number, since it uses as much as digits as its factorization.

1301320321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185902910.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1301320321 is about 36073.8176660026. The cubic root of 1301320321 is about 1091.7622423893.

Adding to 1301320321 its reverse (1230231031), we get a palindrome (2531551352).

The spelling of 1301320321 in words is "one billion, three hundred one million, three hundred twenty thousand, three hundred twenty-one".