1122111 has 6 divisors (see below), whose sum is σ = 1620840.
Its totient is φ = 748068.
The previous prime is 1122103. The next prime is 1122113. The reversal of 1122111 is 1112211.
Adding to 1122111 its reverse (1112211), we get a palindrome (2234322).
It can be divided in two parts, 11 and 22111, that added together give a palindrome (22122).
It is a happy number.
It is not a de Polignac number, because 1122111 - 23 = 1122103 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 124679 = 1122111 / (1 + 1 + 2 + 2 + 1 + 1 + 1).
It is a zygodrome in base 10.
It is a junction number, because it is equal to n+sod(n) for n = 1122093 and 1122102.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1122113) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 62331 + ... + 62348.
It is an arithmetic number, because the mean of its divisors is an integer number (270140).
21122111 is an apocalyptic number.
1122111 is a deficient number, since it is larger than the sum of its proper divisors (498729).
1122111 is a wasteful number, since it uses less digits than its factorization.
1122111 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 124685 (or 124682 counting only the distinct ones).
The product of its digits is 4, while the sum is 9.
The square root of 1122111 is about 1059.2974086629.
The cubic root of 1122111 is about 103.9150872484.
The spelling of 1122111 in words is "one million, one hundred twenty-two thousand, one hundred eleven".