1321342321 has 8 divisors (see below), whose sum is σ = 1440129600. Its totient is φ = 1205004432.

The previous prime is 1321342259. The next prime is 1321342361. The reversal of 1321342321 is 1232431231.

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 1321342321 - 2⁷ = 1321342193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1321342292 and 1321342301.

It is not an unprimeable number, because it can be changed into a prime (1321342361) 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, 611221 + ... + 613378.

It is an arithmetic number, because the mean of its divisors is an integer number (180016200).

Almost surely, 2^1321342321 is an apocalyptic number.

It is an amenable number.

1321342321 is a deficient number, since it is larger than the sum of its proper divisors (118787279).

1321342321 is a wasteful number, since it uses less digits than its factorization.

1321342321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1224695.

The product of its digits is 864, while the sum is 22.

The square root of 1321342321 is about 36350.2726399679. The cubic root of 1321342321 is about 1097.3330214362. Note that the first 3 decimals are identical.

Adding to 1321342321 its reverse (1232431231), we get a palindrome (2553773552).

The spelling of 1321342321 in words is "one billion, three hundred twenty-one million, three hundred forty-two thousand, three hundred twenty-one".