111112012111 has 4 divisors (see below), whose sum is σ = 111112700400. Its totient is φ = 111111323824.

The previous prime is 111112012007. The next prime is 111112012139. The reversal of 111112012111 is 111210211111.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 111112012111 - 2³⁵ = 76752273743 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111112012091 and 111112012100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111112012181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43710 + ... + 473428.

It is an arithmetic number, because the mean of its divisors is an integer number (27778175100).

Almost surely, 2^111112012111 is an apocalyptic number.

111112012111 is a deficient number, since it is larger than the sum of its proper divisors (688289).

111112012111 is an equidigital number, since it uses as much as digits as its factorization.

111112012111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688288.

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

Adding to 111112012111 its reverse (111210211111), we get a palindrome (222322223222).

The spelling of 111112012111 in words is "one hundred eleven billion, one hundred twelve million, twelve thousand, one hundred eleven".