11111011112 has 8 divisors (see below), whose sum is σ = 20833145850. Its totient is φ = 5555505552.

The previous prime is 11111011099. The next prime is 11111011117. The reversal of 11111011112 is 21111011111.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 8147950756 + 2963060356 = 90266^2 + 54434^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 11111011093 and 11111011102.

It is not an unprimeable number, because it can be changed into a prime (11111011117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694438187 + ... + 694438202.

Almost surely, 2^11111011112 is an apocalyptic number.

It is an amenable number.

11111011112 is a deficient number, since it is larger than the sum of its proper divisors (9722134738).

11111011112 is a wasteful number, since it uses less digits than its factorization.

11111011112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1388876395 (or 1388876391 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 11111011112 its reverse (21111011111), we get a palindrome (32222022223).

Subtracting 11111011112 from its reverse (21111011111), we obtain a palindrome (9999999999).

The spelling of 11111011112 in words is "eleven billion, one hundred eleven million, eleven thousand, one hundred twelve".