1321422321 has 16 divisors (see below), whose sum is σ = 1792385280. Its totient is φ = 865729920.

The previous prime is 1321422301. The next prime is 1321422331. The reversal of 1321422321 is 1232241231.

It is not a de Polignac number, because 1321422321 - 2⁹ = 1321421809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1321422301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 259720 + ... + 264758.

It is an arithmetic number, because the mean of its divisors is an integer number (112024080).

Almost surely, 2^1321422321 is an apocalyptic number.

It is an amenable number.

1321422321 is a deficient number, since it is larger than the sum of its proper divisors (470962959).

1321422321 is a wasteful number, since it uses less digits than its factorization.

1321422321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6536.

The product of its digits is 576, while the sum is 21.

The square root of 1321422321 is about 36351.3730277138. The cubic root of 1321422321 is about 1097.3551668128.

Adding to 1321422321 its reverse (1232241231), we get a palindrome (2553663552).

The spelling of 1321422321 in words is "one billion, three hundred twenty-one million, four hundred twenty-two thousand, three hundred twenty-one".