13111331213 has 2 divisors, whose sum is σ = 13111331214. Its totient is φ = 13111331212.

The previous prime is 13111331179. The next prime is 13111331249. The reversal of 13111331213 is 31213311131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12860013604 + 251317609 = 113402^2 + 15853^2 .

It is a cyclic number.

It is not a de Polignac number, because 13111331213 - 2¹⁶ = 13111265677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13111334213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6555665606 + 6555665607.

It is an arithmetic number, because the mean of its divisors is an integer number (6555665607).

Almost surely, 2^13111331213 is an apocalyptic number.

It is an amenable number.

13111331213 is a deficient number, since it is larger than the sum of its proper divisors (1).

13111331213 is an equidigital number, since it uses as much as digits as its factorization.

13111331213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 162, while the sum is 20.

Adding to 13111331213 its reverse (31213311131), we get a palindrome (44324642344).

The spelling of 13111331213 in words is "thirteen billion, one hundred eleven million, three hundred thirty-one thousand, two hundred thirteen".