1123312111 has 8 divisors (see below), whose sum is σ = 1241102304. Its totient is φ = 1011267840.

The previous prime is 1123312109. The next prime is 1123312121. The reversal of 1123312111 is 1112133211.

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 1123312111 - 2¹ = 1123312109 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 (1123312121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1436070 + ... + 1436851.

It is an arithmetic number, because the mean of its divisors is an integer number (155137788).

Almost surely, 2^1123312111 is an apocalyptic number.

1123312111 is a deficient number, since it is larger than the sum of its proper divisors (117790193).

1123312111 is a wasteful number, since it uses less digits than its factorization.

1123312111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2872961.

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

The square root of 1123312111 is about 33515.8486540323. The cubic root of 1123312111 is about 1039.5215103483.

Adding to 1123312111 its reverse (1112133211), we get a palindrome (2235445322).

The spelling of 1123312111 in words is "one billion, one hundred twenty-three million, three hundred twelve thousand, one hundred eleven".