13131321111111 has 16 divisors (see below), whose sum is σ = 20009933483264. Its totient is φ = 7503499070784.

The previous prime is 13131321111091. The next prime is 13131321111119. The reversal of 13131321111111 is 11111112313131.

It is not a de Polignac number, because 13131321111111 - 2²⁵ = 13131287556679 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13131321111119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3270046 + ... + 6079131.

It is an arithmetic number, because the mean of its divisors is an integer number (1250620842704).

Almost surely, 2^{13131321111111} is an apocalyptic number.

13131321111111 is a deficient number, since it is larger than the sum of its proper divisors (6878612372153).

13131321111111 is an equidigital number, since it uses as much as digits as its factorization.

13131321111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9416070.

The product of its digits is 54, while the sum is 21.

Adding to 13131321111111 its reverse (11111112313131), we get a palindrome (24242433424242).

The spelling of 13131321111111 in words is "thirteen trillion, one hundred thirty-one billion, three hundred twenty-one million, one hundred eleven thousand, one hundred eleven".