13031020321 has 8 divisors (see below), whose sum is σ = 14218756704. Its totient is φ = 11843800320.

The previous prime is 13031020279. The next prime is 13031020337. The reversal of 13031020321 is 12302013031.

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

It is not a de Polignac number, because 13031020321 - 2⁷ = 13031020193 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13031020295 and 13031020304.

It is not an unprimeable number, because it can be changed into a prime (13031020361) 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, 75351 + ... + 178156.

It is an arithmetic number, because the mean of its divisors is an integer number (1777344588).

Almost surely, 2^13031020321 is an apocalyptic number.

13031020321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13031020321 is a deficient number, since it is larger than the sum of its proper divisors (1187736383).

13031020321 is a wasteful number, since it uses less digits than its factorization.

13031020321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258191.

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

Adding to 13031020321 its reverse (12302013031), we get a palindrome (25333033352).

The spelling of 13031020321 in words is "thirteen billion, thirty-one million, twenty thousand, three hundred twenty-one".