1123321111 has 4 divisors (see below), whose sum is σ = 1225441224. Its totient is φ = 1021201000.

The previous prime is 1123321109. The next prime is 1123321117. The reversal of 1123321111 is 1111233211.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1123321111 - 2¹ = 1123321109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123321117) 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, 51060040 + ... + 51060061.

It is an arithmetic number, because the mean of its divisors is an integer number (306360306).

Almost surely, 2^1123321111 is an apocalyptic number.

1123321111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1123321111 is a deficient number, since it is larger than the sum of its proper divisors (102120113).

1123321111 is a wasteful number, since it uses less digits than its factorization.

1123321111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102120112.

The product of its digits is 36, while the sum is 16.

The square root of 1123321111 is about 33515.9829186017. The cubic root of 1123321111 is about 1039.5242865636.

Adding to 1123321111 its reverse (1111233211), we get a palindrome (2234554322).

It can be divided in two parts, 11233211 and 11, that multiplied together give a palindrome (123565321).

The spelling of 1123321111 in words is "one billion, one hundred twenty-three million, three hundred twenty-one thousand, one hundred eleven".