112112221121 has 4 divisors (see below), whose sum is σ = 112113020592. Its totient is φ = 112111421652.

The previous prime is 112112221099. The next prime is 112112221157. The reversal of 112112221121 is 121122211211.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-112112221121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 112112221121.

It is not an unprimeable number, because it can be changed into a prime (112112221181) 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, 127655 + ... + 490428.

It is an arithmetic number, because the mean of its divisors is an integer number (28028255148).

Almost surely, 2^112112221121 is an apocalyptic number.

It is an amenable number.

112112221121 is a deficient number, since it is larger than the sum of its proper divisors (799471).

112112221121 is an equidigital number, since it uses as much as digits as its factorization.

112112221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799470.

The product of its digits is 32, while the sum is 17.

Adding to 112112221121 its reverse (121122211211), we get a palindrome (233234432332).

The spelling of 112112221121 in words is "one hundred twelve billion, one hundred twelve million, two hundred twenty-one thousand, one hundred twenty-one".