11121312 has 96 divisors (see below), whose sum is σ = 31256064. Its totient is φ = 3456000.

The previous prime is 11121307. The next prime is 11121329. The reversal of 11121312 is 21312111.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110062 + ... + 110162.

It is an arithmetic number, because the mean of its divisors is an integer number (325584).

Almost surely, 2^11121312 is an apocalyptic number.

11121312 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 11121312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15628032).

11121312 is an abundant number, since it is smaller than the sum of its proper divisors (20134752).

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

11121312 is a wasteful number, since it uses less digits than its factorization.

11121312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182 (or 174 counting only the distinct ones).

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

The square root of 11121312 is about 3334.8631156316. The cubic root of 11121312 is about 223.2125839181.

Adding to 11121312 its reverse (21312111), we get a palindrome (32433423).

It can be divided in two parts, 111 and 21312, that multiplied together give a palindrome (2365632).

The spelling of 11121312 in words is "eleven million, one hundred twenty-one thousand, three hundred twelve".