13231123321 has 32 divisors (see below), whose sum is σ = 14709371040. Its totient is φ = 11826432000.

The previous prime is 13231123319. The next prime is 13231123369. The reversal of 13231123321 is 12332113231.

It can be written as a sum of positive squares in 16 ways, for example, as 8900035600 + 4331087721 = 94340^2 + 65811^2 .

It is a cyclic number.

It is not a de Polignac number, because 13231123321 - 2¹ = 13231123319 is a prime.

13231123321 is a modest number, since divided by 123321 gives 13231 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 13231123292 and 13231123301.

It is not an unprimeable number, because it can be changed into a prime (13231123121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18661315 + ... + 18662023.

It is an arithmetic number, because the mean of its divisors is an integer number (459667845).

Almost surely, 2^13231123321 is an apocalyptic number.

It is an amenable number.

13231123321 is a deficient number, since it is larger than the sum of its proper divisors (1478247719).

13231123321 is a wasteful number, since it uses less digits than its factorization.

13231123321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1117.

The product of its digits is 648, while the sum is 22.

Adding to 13231123321 its reverse (12332113231), we get a palindrome (25563236552).

The spelling of 13231123321 in words is "thirteen billion, two hundred thirty-one million, one hundred twenty-three thousand, three hundred twenty-one".