112111021 has 4 divisors (see below), whose sum is σ = 122302944. Its totient is φ = 101919100.

The previous prime is 112111009. The next prime is 112111049. The reversal of 112111021 is 120111211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 120111211 = 11 ⋅10919201.

It is a cyclic number.

It is not a de Polignac number, because 112111021 - 2⁵ = 112110989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 112110989 and 112111007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112111091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5095945 + ... + 5095966.

It is an arithmetic number, because the mean of its divisors is an integer number (30575736).

Almost surely, 2^112111021 is an apocalyptic number.

112111021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

112111021 is a deficient number, since it is larger than the sum of its proper divisors (10191923).

112111021 is a wasteful number, since it uses less digits than its factorization.

112111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10191922.

The product of its (nonzero) digits is 4, while the sum is 10.

The square root of 112111021 is about 10588.2491942719. The cubic root of 112111021 is about 482.1876719068.

Adding to 112111021 its reverse (120111211), we get a palindrome (232222232).

The spelling of 112111021 in words is "one hundred twelve million, one hundred eleven thousand, twenty-one".