1121111 has 8 divisors (see below), whose sum is σ = 1179120.
Its totient is φ = 1064448.
The previous prime is 1121101. The next prime is 1121143. The reversal of 1121111 is 1111211.
It is a happy number.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is not a de Polignac number, because 1121111 - 26 = 1121047 is a prime.
It is a Duffinian number.
1121111 is a modest number, since divided by 1111 gives 112 as remainder.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1121101) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1655 + ... + 2231.
It is an arithmetic number, because the mean of its divisors is an integer number (147390).
21121111 is an apocalyptic number.
1121111 is a deficient number, since it is larger than the sum of its proper divisors (58009).
1121111 is an equidigital number, since it uses as much as digits as its factorization.
1121111 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 673.
The product of its digits is 2, while the sum is 8.
The square root of 1121111 is about 1058.8252924822.
The cubic root of 1121111 is about 103.8842091471.
Adding to 1121111 its reverse (1111211), we get a palindrome (2232322).
It can be divided in two parts, 11211 and 11, that multiplied together give a palindrome (123321).
The spelling of 1121111 in words is "one million, one hundred twenty-one thousand, one hundred eleven".