111211011111011 has 16 divisors (see below), whose sum is σ = 131341736917248. Its totient is φ = 92185042572000.

The previous prime is 111211011111001. The next prime is 111211011111023. The reversal of 111211011111011 is 110111110112111.

It is a de Polignac number, because none of the positive numbers 2^k-111211011111011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111211011111001) 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, 1829037905 + ... + 1829098706.

It is an arithmetic number, because the mean of its divisors is an integer number (8208858557328).

Almost surely, 2^{111211011111011} is an apocalyptic number.

111211011111011 is a deficient number, since it is larger than the sum of its proper divisors (20130725806237).

111211011111011 is a wasteful number, since it uses less digits than its factorization.

111211011111011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3658136762.

The product of its (nonzero) digits is 2, while the sum is 14.

Adding to 111211011111011 its reverse (110111110112111), we get a palindrome (221322121223122).

The spelling of 111211011111011 in words is "one hundred eleven trillion, two hundred eleven billion, eleven million, one hundred eleven thousand, eleven".