1112123111 has 4 divisors (see below), whose sum is σ = 1213225224. Its totient is φ = 1011021000.

The previous prime is 1112123107. The next prime is 1112123123. The reversal of 1112123111 is 1113212111.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1112123111 - 2² = 1112123107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1112123191) 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, 50551040 + ... + 50551061.

It is an arithmetic number, because the mean of its divisors is an integer number (303306306).

Almost surely, 2^1112123111 is an apocalyptic number.

1112123111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1112123111 is a deficient number, since it is larger than the sum of its proper divisors (101102113).

1112123111 is a wasteful number, since it uses less digits than its factorization.

1112123111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101102112.

The product of its digits is 12, while the sum is 14.

The square root of 1112123111 is about 33348.5098767546. The cubic root of 1112123111 is about 1036.0585251271.

Adding to 1112123111 its reverse (1113212111), we get a palindrome (2225335222).

The spelling of 1112123111 in words is "one billion, one hundred twelve million, one hundred twenty-three thousand, one hundred eleven".