1321312323 has 8 divisors (see below), whose sum is σ = 1764683536. Its totient is φ = 879408000.

The previous prime is 1321312309. The next prime is 1321312327. The reversal of 1321312323 is 3232131231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1321312323 - 2⁶ = 1321312259 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1321312323.

It is not an unprimeable number, because it can be changed into a prime (1321312327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 364618 + ... + 368223.

It is an arithmetic number, because the mean of its divisors is an integer number (220585442).

Almost surely, 2^1321312323 is an apocalyptic number.

1321312323 is a deficient number, since it is larger than the sum of its proper divisors (443371213).

1321312323 is an equidigital number, since it uses as much as digits as its factorization.

1321312323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733445.

The product of its digits is 648, while the sum is 21.

The square root of 1321312323 is about 36349.8600134856. The cubic root of 1321312323 is about 1097.3247172431.

Adding to 1321312323 its reverse (3232131231), we get a palindrome (4553443554).

The spelling of 1321312323 in words is "one billion, three hundred twenty-one million, three hundred twelve thousand, three hundred twenty-three".