112111221222121 has 4 divisors (see below), whose sum is σ = 122303150424144. Its totient is φ = 101919292020100.

The previous prime is 112111221222109. The next prime is 112111221222127. The reversal of 112111221222121 is 121222122111211.

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.

It is a cyclic number.

It is not a de Polignac number, because 112111221222121 - 2²⁹ = 112110684351209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 112111221222092 and 112111221222101.

It is not an unprimeable number, because it can be changed into a prime (112111221222127) 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, 5095964600995 + ... + 5095964601016.

It is an arithmetic number, because the mean of its divisors is an integer number (30575787606036).

Almost surely, 2^{112111221222121} is an apocalyptic number.

112111221222121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

112111221222121 is a deficient number, since it is larger than the sum of its proper divisors (10191929202023).

112111221222121 is a wasteful number, since it uses less digits than its factorization.

112111221222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10191929202022.

The product of its digits is 128, while the sum is 22.

Adding to 112111221222121 its reverse (121222122111211), we get a palindrome (233333343333332).

The spelling of 112111221222121 in words is "one hundred twelve trillion, one hundred eleven billion, two hundred twenty-one million, two hundred twenty-two thousand, one hundred twenty-one".