1223111 has 4 divisors (see below), whose sum is σ = 1243224. Its totient is φ = 1203000.

The previous prime is 1223093. The next prime is 1223119. The reversal of 1223111 is 1113221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1223111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1223092 and 1223101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223119) 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 3 ways as a sum of consecutive naturals, for example, 9965 + ... + 10086.

It is an arithmetic number, because the mean of its divisors is an integer number (310806).

2^1223111 is an apocalyptic number.

1223111 is a deficient number, since it is larger than the sum of its proper divisors (20113).

1223111 is an equidigital number, since it uses as much as digits as its factorization.

1223111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20112.

The product of its digits is 12, while the sum is 11.

The square root of 1223111 is about 1105.9434886105. The cubic root of 1223111 is about 106.9437209499.

Adding to 1223111 its reverse (1113221), we get a palindrome (2336332).

The spelling of 1223111 in words is "one million, two hundred twenty-three thousand, one hundred eleven".