11111111101112 has 192 divisors, whose sum is σ = 24040624608000. Its totient is φ = 4806404951040.

The previous prime is 11111111101099. The next prime is 11111111101127. The reversal of 11111111101112 is 21110111111111.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 277487189 + ... + 277527227.

It is an arithmetic number, because the mean of its divisors is an integer number (125211586500).

Almost surely, 2^{11111111101112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11111111101112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12020312304000).

11111111101112 is an abundant number, since it is smaller than the sum of its proper divisors (12929513506888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11111111101112 is a wasteful number, since it uses less digits than its factorization.

11111111101112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40282 (or 40267 counting only the distinct ones).

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

Adding to 11111111101112 its reverse (21110111111111), we get a palindrome (32221222212223).

Subtracting 11111111101112 from its reverse (21110111111111), we obtain a palindrome (9999000009999).

The spelling of 11111111101112 in words is "eleven trillion, one hundred eleven billion, one hundred eleven million, one hundred one thousand, one hundred twelve".