1330023221 has 4 divisors (see below), whose sum is σ = 1341793452. Its totient is φ = 1318252992.

The previous prime is 1330023197. The next prime is 1330023293. The reversal of 1330023221 is 1223200331.

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 385690321 + 944332900 = 19639^2 + 30730^2 .

It is a cyclic number.

It is not a de Polignac number, because 1330023221 - 2⁶ = 1330023157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1330023221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1330023421) 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, 5884946 + ... + 5885171.

It is an arithmetic number, because the mean of its divisors is an integer number (335448363).

Almost surely, 2^1330023221 is an apocalyptic number.

It is an amenable number.

1330023221 is a deficient number, since it is larger than the sum of its proper divisors (11770231).

1330023221 is a wasteful number, since it uses less digits than its factorization.

1330023221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11770230.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 1330023221 is about 36469.4834210741. The cubic root of 1330023221 is about 1099.7308490248.

Adding to 1330023221 its reverse (1223200331), we get a palindrome (2553223552).

The spelling of 1330023221 in words is "one billion, three hundred thirty million, twenty-three thousand, two hundred twenty-one".