11123712 has 132 divisors (see below), whose sum is σ = 34487856. Its totient is φ = 3440640.

The previous prime is 11123701. The next prime is 11123719. The reversal of 11123712 is 21732111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11123719) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 156637 + ... + 156707.

Almost surely, 2^11123712 is an apocalyptic number.

11123712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11123712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17243928).

11123712 is an abundant number, since it is smaller than the sum of its proper divisors (23364144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11123712 is a wasteful number, since it uses less digits than its factorization.

11123712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114 (or 93 counting only the distinct ones).

The product of its digits is 84, while the sum is 18.

The square root of 11123712 is about 3335.2229310797. Note that the first 3 decimals coincide. The cubic root of 11123712 is about 223.2286393281.

Adding to 11123712 its reverse (21732111), we get a palindrome (32855823).

The spelling of 11123712 in words is "eleven million, one hundred twenty-three thousand, seven hundred twelve".