11111121111112 has 32 divisors (see below), whose sum is σ = 22727481818400. Its totient is φ = 5050467676800.

The previous prime is 11111121111061. The next prime is 11111121111121. The reversal of 11111121111112 is 21111112111111.

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11767687 + ... + 12676777.

It is an arithmetic number, because the mean of its divisors is an integer number (710233806825).

Almost surely, 2^{11111121111112} is an apocalyptic number.

It is an amenable number.

11111121111112 is an abundant number, since it is smaller than the sum of its proper divisors (11616360707288).

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

11111121111112 is a wasteful number, since it uses less digits than its factorization.

11111121111112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1047997 (or 1047993 counting only the distinct ones).

The product of its digits is 4, while the sum is 16.

Adding to 11111121111112 its reverse (21111112111111), we get a palindrome (32222233222223).

Subtracting 11111121111112 from its reverse (21111112111111), we obtain a palindrome (9999990999999).

It can be divided in two parts, 1111112111111 and 2, that multiplied together give a palindrome (2222224222222).

The spelling of 11111121111112 in words is "eleven trillion, one hundred eleven billion, one hundred twenty-one million, one hundred eleven thousand, one hundred twelve".