11331212111 has 2 divisors, whose sum is σ = 11331212112. Its totient is φ = 11331212110.

The previous prime is 11331212099. The next prime is 11331212141. The reversal of 11331212111 is 11121213311.

11331212111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11331212111 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11331212111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11331212141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5665606055 + 5665606056.

It is an arithmetic number, because the mean of its divisors is an integer number (5665606056).

Almost surely, 2^11331212111 is an apocalyptic number.

11331212111 is a deficient number, since it is larger than the sum of its proper divisors (1).

11331212111 is an equidigital number, since it uses as much as digits as its factorization.

11331212111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36, while the sum is 17.

Adding to 11331212111 its reverse (11121213311), we get a palindrome (22452425422).

The spelling of 11331212111 in words is "eleven billion, three hundred thirty-one million, two hundred twelve thousand, one hundred eleven".