1321233223 has 4 divisors (see below), whose sum is σ = 1321517808. Its totient is φ = 1320948640.

The previous prime is 1321233203. The next prime is 1321233247. The reversal of 1321233223 is 3223321231.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1321233223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1321233194 and 1321233203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321233203) 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, 135211 + ... + 144652.

It is an arithmetic number, because the mean of its divisors is an integer number (330379452).

Almost surely, 2^1321233223 is an apocalyptic number.

1321233223 is a deficient number, since it is larger than the sum of its proper divisors (284585).

1321233223 is an equidigital number, since it uses as much as digits as its factorization.

1321233223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284584.

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

The square root of 1321233223 is about 36348.7719599989. The cubic root of 1321233223 is about 1097.3028197917.

Adding to 1321233223 its reverse (3223321231), we get a palindrome (4544554454).

The spelling of 1321233223 in words is "one billion, three hundred twenty-one million, two hundred thirty-three thousand, two hundred twenty-three".