1213332321 has 8 divisors (see below), whose sum is σ = 1627464384. Its totient is φ = 804044240.

The previous prime is 1213332221. The next prime is 1213332359. The reversal of 1213332321 is 1232333121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1213332321 - 2⁷ = 1213332193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1213332361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1210410 + ... + 1211411.

It is an arithmetic number, because the mean of its divisors is an integer number (203433048).

Almost surely, 2^1213332321 is an apocalyptic number.

It is an amenable number.

1213332321 is a deficient number, since it is larger than the sum of its proper divisors (414132063).

1213332321 is a wasteful number, since it uses less digits than its factorization.

1213332321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2421991.

The product of its digits is 648, while the sum is 21.

The square root of 1213332321 is about 34832.9200756985. The cubic root of 1213332321 is about 1066.5795574155.

Adding to 1213332321 its reverse (1232333121), we get a palindrome (2445665442).

The spelling of 1213332321 in words is "one billion, two hundred thirteen million, three hundred thirty-two thousand, three hundred twenty-one".