13111212211 has 2 divisors, whose sum is σ = 13111212212. Its totient is φ = 13111212210.

The previous prime is 13111212197. The next prime is 13111212229. The reversal of 13111212211 is 11221211131.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13111212211 - 2²³ = 13102823603 is a prime.

It is not a weakly prime, because it can be changed into another prime (13111212271) 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 as a sum of consecutive naturals, namely, 6555606105 + 6555606106.

It is an arithmetic number, because the mean of its divisors is an integer number (6555606106).

Almost surely, 2^13111212211 is an apocalyptic number.

13111212211 is a deficient number, since it is larger than the sum of its proper divisors (1).

13111212211 is an equidigital number, since it uses as much as digits as its factorization.

13111212211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24, while the sum is 16.

Adding to 13111212211 its reverse (11221211131), we get a palindrome (24332423342).

The spelling of 13111212211 in words is "thirteen billion, one hundred eleven million, two hundred twelve thousand, two hundred eleven".