1122112111 has 4 divisors (see below), whose sum is σ = 1130185000. Its totient is φ = 1114039224.

The previous prime is 1122112099. The next prime is 1122112151. The reversal of 1122112111 is 1112112211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1112112211 = 7 ⋅158873173.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1122112111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1122112091 and 1122112100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122112151) 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, 4036236 + ... + 4036513.

It is an arithmetic number, because the mean of its divisors is an integer number (282546250).

Almost surely, 2^1122112111 is an apocalyptic number.

1122112111 is a deficient number, since it is larger than the sum of its proper divisors (8072889).

1122112111 is an equidigital number, since it uses as much as digits as its factorization.

1122112111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8072888.

The product of its digits is 8, while the sum is 13.

The square root of 1122112111 is about 33497.9418920029. The cubic root of 1122112111 is about 1039.1512154381.

Adding to 1122112111 its reverse (1112112211), we get a palindrome (2234224322).

It can be divided in two parts, 11221 and 12111, that added together give a palindrome (23332).

The spelling of 1122112111 in words is "one billion, one hundred twenty-two million, one hundred twelve thousand, one hundred eleven".