1321323233 has 4 divisors (see below), whose sum is σ = 1334945220. Its totient is φ = 1307701248.

The previous prime is 1321323197. The next prime is 1321323299. The reversal of 1321323233 is 3323231231.

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 465351184 + 855972049 = 21572^2 + 29257^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321323233 - 2¹² = 1321319137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1321323199 and 1321323208.

It is not an unprimeable number, because it can be changed into a prime (1321323733) 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, 6810848 + ... + 6811041.

It is an arithmetic number, because the mean of its divisors is an integer number (333736305).

Almost surely, 2^1321323233 is an apocalyptic number.

It is an amenable number.

1321323233 is a deficient number, since it is larger than the sum of its proper divisors (13621987).

1321323233 is an equidigital number, since it uses as much as digits as its factorization.

1321323233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13621986.

The product of its digits is 1944, while the sum is 23.

The square root of 1321323233 is about 36350.0100825296. The cubic root of 1321323233 is about 1097.3277374172.

Adding to 1321323233 its reverse (3323231231), we get a palindrome (4644554464).

The spelling of 1321323233 in words is "one billion, three hundred twenty-one million, three hundred twenty-three thousand, two hundred thirty-three".