1330421321 has 4 divisors (see below), whose sum is σ = 1366378692. Its totient is φ = 1294463952.

The previous prime is 1330421303. The next prime is 1330421353. The reversal of 1330421321 is 1231240331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1231240331 = 13627 ⋅90353.

It can be written as a sum of positive squares in 2 ways, for example, as 1150566400 + 179854921 = 33920^2 + 13411^2 .

It is a cyclic number.

It is not a de Polignac number, because 1330421321 - 2¹⁰ = 1330420297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1330421293 and 1330421302.

It is not an unprimeable number, because it can be changed into a prime (1330420321) 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, 17978630 + ... + 17978703.

It is an arithmetic number, because the mean of its divisors is an integer number (341594673).

Almost surely, 2^1330421321 is an apocalyptic number.

It is an amenable number.

1330421321 is a deficient number, since it is larger than the sum of its proper divisors (35957371).

1330421321 is an equidigital number, since it uses as much as digits as its factorization.

1330421321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35957370.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1330421321 is about 36474.9410006377. The cubic root of 1330421321 is about 1099.8405611889.

Adding to 1330421321 its reverse (1231240331), we get a palindrome (2561661652).

The spelling of 1330421321 in words is "one billion, three hundred thirty million, four hundred twenty-one thousand, three hundred twenty-one".