1322221321 has 4 divisors (see below), whose sum is σ = 1323832644. Its totient is φ = 1320610000.

The previous prime is 1322221283. The next prime is 1322221337. The reversal of 1322221321 is 1231222231.

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 589761225 + 732460096 = 24285^2 + 27064^2 .

It is a cyclic number.

It is not a de Polignac number, because 1322221321 - 2⁷ = 1322221193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1322221391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 804430 + ... + 806071.

It is an arithmetic number, because the mean of its divisors is an integer number (330958161).

Almost surely, 2^1322221321 is an apocalyptic number.

It is an amenable number.

1322221321 is a deficient number, since it is larger than the sum of its proper divisors (1611323).

1322221321 is an equidigital number, since it uses as much as digits as its factorization.

1322221321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1611322.

The product of its digits is 288, while the sum is 19.

The square root of 1322221321 is about 36362.3613232144. The cubic root of 1322221321 is about 1097.5762947361.

Adding to 1322221321 its reverse (1231222231), we get a palindrome (2553443552).

It can be divided in two parts, 13222 and 21321, that added together give a palindrome (34543).

The spelling of 1322221321 in words is "one billion, three hundred twenty-two million, two hundred twenty-one thousand, three hundred twenty-one".