13031211321 has 12 divisors (see below), whose sum is σ = 18846788272. Its totient is φ = 8676430776.

The previous prime is 13031211307. The next prime is 13031211329. The reversal of 13031211321 is 12311213031.

13031211321 is a `hidden beast` number, since 1 + 30 + 312 + 1 + 1 + 321 = 666.

It is not a de Polignac number, because 13031211321 - 2¹⁵ = 13031178553 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13031211294 and 13031211303.

It is not an unprimeable number, because it can be changed into a prime (13031211329) 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 11 ways as a sum of consecutive naturals, for example, 912811 + ... + 926976.

Almost surely, 2^13031211321 is an apocalyptic number.

It is an amenable number.

13031211321 is a deficient number, since it is larger than the sum of its proper divisors (5815576951).

13031211321 is a wasteful number, since it uses less digits than its factorization.

13031211321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1840580 (or 1840577 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 13031211321 its reverse (12311213031), we get a palindrome (25342424352).

The spelling of 13031211321 in words is "thirteen billion, thirty-one million, two hundred eleven thousand, three hundred twenty-one".