1330312321 has 4 divisors (see below), whose sum is σ = 1432644052. Its totient is φ = 1227980592.

The previous prime is 1330312289. The next prime is 1330312337. The reversal of 1330312321 is 1232130331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1232130331 = 10067 ⋅122393.

It can be written as a sum of positive squares in 2 ways, for example, as 253159921 + 1077152400 = 15911^2 + 32820^2 .

It is a cyclic number.

It is not a de Polignac number, because 1330312321 - 2⁵ = 1330312289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1330312381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51165846 + ... + 51165871.

It is an arithmetic number, because the mean of its divisors is an integer number (358161013).

Almost surely, 2^1330312321 is an apocalyptic number.

It is an amenable number.

1330312321 is a deficient number, since it is larger than the sum of its proper divisors (102331731).

1330312321 is a wasteful number, since it uses less digits than its factorization.

1330312321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102331730.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 1330312321 is about 36473.4467935236. The cubic root of 1330312321 is about 1099.8105241138.

Adding to 1330312321 its reverse (1232130331), we get a palindrome (2562442652).

The spelling of 1330312321 in words is "one billion, three hundred thirty million, three hundred twelve thousand, three hundred twenty-one".