13211331313231 has 4 divisors (see below), whose sum is σ = 13211365728600. Its totient is φ = 13211296897864.

The previous prime is 13211331313189. The next prime is 13211331313253. The reversal of 13211331313231 is 13231313311231.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 13211331313231 - 2²¹ = 13211329216079 is a prime.

It is a super-2 number, since 2×13211331313231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13211331313231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13211331313291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16625296 + ... + 17401813.

It is an arithmetic number, because the mean of its divisors is an integer number (3302841432150).

Almost surely, 2^{13211331313231} is an apocalyptic number.

13211331313231 is a deficient number, since it is larger than the sum of its proper divisors (34415369).

13211331313231 is an equidigital number, since it uses as much as digits as its factorization.

13211331313231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34415368.

The product of its digits is 2916, while the sum is 28.

Adding to 13211331313231 its reverse (13231313311231), we get a palindrome (26442644624462).

The spelling of 13211331313231 in words is "thirteen trillion, two hundred eleven billion, three hundred thirty-one million, three hundred thirteen thousand, two hundred thirty-one".