1321323013 has 16 divisors (see below), whose sum is σ = 1407132160. Its totient is φ = 1238846400.

The previous prime is 1321323001. The next prime is 1321323041. The reversal of 1321323013 is 3103231231.

It is a cyclic number.

It is not a de Polignac number, because 1321323013 - 2¹³ = 1321314821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321323053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121483 + ... + 131911.

It is an arithmetic number, because the mean of its divisors is an integer number (87945760).

Almost surely, 2^1321323013 is an apocalyptic number.

It is an amenable number.

1321323013 is a deficient number, since it is larger than the sum of its proper divisors (85809147).

1321323013 is a wasteful number, since it uses less digits than its factorization.

1321323013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10588.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 1321323013 is about 36350.0070563955. The cubic root of 1321323013 is about 1097.3276765156.

Adding to 1321323013 its reverse (3103231231), we get a palindrome (4424554244).

The spelling of 1321323013 in words is "one billion, three hundred twenty-one million, three hundred twenty-three thousand, thirteen".