111111210112 has 128 divisors (see below), whose sum is σ = 268540116480. Its totient is φ = 44703744000.

The previous prime is 111111210103. The next prime is 111111210173. The reversal of 111111210112 is 211012111111.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×111111210112² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111111210092 and 111111210101.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6098937 + ... + 6117127.

It is an arithmetic number, because the mean of its divisors is an integer number (2097969660).

Almost surely, 2^111111210112 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 111111210112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134270058240).

111111210112 is an abundant number, since it is smaller than the sum of its proper divisors (157428906368).

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

111111210112 is a wasteful number, since it uses less digits than its factorization.

111111210112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18630 (or 18618 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 111111210112 its reverse (211012111111), we get a palindrome (322123321223).

Subtracting 111111210112 from its reverse (211012111111), we obtain a palindrome (99900900999).

The spelling of 111111210112 in words is "one hundred eleven billion, one hundred eleven million, two hundred ten thousand, one hundred twelve".