111111111001011 has 16 divisors (see below), whose sum is σ = 163216321475328. Its totient is φ = 66673333932000.

The previous prime is 111111111000991. The next prime is 111111111001021. The reversal of 111111111001011 is 110100111111111.

It is not a de Polignac number, because 111111111001011 - 2¹¹ = 111111110998963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111111111001021) 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, 16668330151 + ... + 16668336816.

It is an arithmetic number, because the mean of its divisors is an integer number (10201020092208).

Almost surely, 2^{111111111001011} is an apocalyptic number.

111111111001011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

111111111001011 is a deficient number, since it is larger than the sum of its proper divisors (52105210474317).

111111111001011 is a wasteful number, since it uses less digits than its factorization.

111111111001011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33336667082.

The product of its (nonzero) digits is 1, while the sum is 12.

Adding to 111111111001011 its reverse (110100111111111), we get a palindrome (221211222112122).

The spelling of 111111111001011 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred eleven million, one thousand, eleven".