1323030320221 has 4 divisors (see below), whose sum is σ = 1323191496700. Its totient is φ = 1322869143744.

The previous prime is 1323030320203. The next prime is 1323030320239. The reversal of 1323030320221 is 1220230303231.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1323030320203) and next prime (1323030320239).

It can be written as a sum of positive squares in 2 ways, for example, as 443675888100 + 879354432121 = 666090^2 + 937739^2 .

It is a cyclic number.

It is not a de Polignac number, because 1323030320221 - 2⁷ = 1323030320093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1323030320192 and 1323030320201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323030320281) 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, 80575926 + ... + 80592343.

It is an arithmetic number, because the mean of its divisors is an integer number (330797874175).

Almost surely, 2^{1323030320221} is an apocalyptic number.

It is an amenable number.

1323030320221 is a deficient number, since it is larger than the sum of its proper divisors (161176479).

1323030320221 is an equidigital number, since it uses as much as digits as its factorization.

1323030320221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161176478.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 1323030320221 its reverse (1220230303231), we get a palindrome (2543260623452).

The spelling of 1323030320221 in words is "one trillion, three hundred twenty-three billion, thirty million, three hundred twenty thousand, two hundred twenty-one".