1321323113 has 64 divisors (see below), whose sum is σ = 1672151040. Its totient is φ = 1028966400.

The previous prime is 1321323097. The next prime is 1321323119. The reversal of 1321323113 is 3113231231.

It is not a de Polignac number, because 1321323113 - 2⁴ = 1321323097 is a prime.

It is a super-3 number, since 3×1321323113³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321323119) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10404056 + ... + 10404182.

It is an arithmetic number, because the mean of its divisors is an integer number (26127360).

Almost surely, 2^1321323113 is an apocalyptic number.

It is an amenable number.

1321323113 is a deficient number, since it is larger than the sum of its proper divisors (350827927).

1321323113 is a wasteful number, since it uses less digits than its factorization.

1321323113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278.

The product of its digits is 324, while the sum is 20.

The square root of 1321323113 is about 36350.0084319110. The cubic root of 1321323113 is about 1097.3277041982.

Adding to 1321323113 its reverse (3113231231), we get a palindrome (4434554344).

The spelling of 1321323113 in words is "one billion, three hundred twenty-one million, three hundred twenty-three thousand, one hundred thirteen".