1321310023 has 24 divisors (see below), whose sum is σ = 1538792064. Its totient is φ = 1124937600.

The previous prime is 1321310009. The next prime is 1321310033. The reversal of 1321310023 is 3200131231.

It is not a de Polignac number, because 1321310023 - 2⁵ = 1321309991 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1321309979 and 1321310006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321310033) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 720718 + ... + 722548.

It is an arithmetic number, because the mean of its divisors is an integer number (64116336).

Almost surely, 2^1321310023 is an apocalyptic number.

1321310023 is a deficient number, since it is larger than the sum of its proper divisors (217482041).

1321310023 is a wasteful number, since it uses less digits than its factorization.

1321310023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2103 (or 2086 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1321310023 is about 36349.8283764862. The cubic root of 1321310023 is about 1097.3240805407.

Adding to 1321310023 its reverse (3200131231), we get a palindrome (4521441254).

The spelling of 1321310023 in words is "one billion, three hundred twenty-one million, three hundred ten thousand, twenty-three".