13032031321 has 4 divisors (see below), whose sum is σ = 13210552372. Its totient is φ = 12853510272.

The previous prime is 13032031307. The next prime is 13032031367. The reversal of 13032031321 is 12313023031.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4283048025 + 8748983296 = 65445^2 + 93536^2 .

It is a cyclic number.

It is not a de Polignac number, because 13032031321 - 2¹³ = 13032023129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13032031381) 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, 89260416 + ... + 89260561.

It is an arithmetic number, because the mean of its divisors is an integer number (3302638093).

Almost surely, 2^13032031321 is an apocalyptic number.

It is an amenable number.

13032031321 is a deficient number, since it is larger than the sum of its proper divisors (178521051).

13032031321 is an equidigital number, since it uses as much as digits as its factorization.

13032031321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178521050.

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

Adding to 13032031321 its reverse (12313023031), we get a palindrome (25345054352).

The spelling of 13032031321 in words is "thirteen billion, thirty-two million, thirty-one thousand, three hundred twenty-one".