12111330 has 128 divisors (see below), whose sum is σ = 37324800. Its totient is φ = 2493120.

The previous prime is 12111313. The next prime is 12111331. The reversal of 12111330 is 3311121.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 113137 + ... + 113243.

It is an arithmetic number, because the mean of its divisors is an integer number (291600).

Almost surely, 2^12111330 is an apocalyptic number.

12111330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12111330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18662400).

12111330 is an abundant number, since it is smaller than the sum of its proper divisors (25213470).

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

12111330 is a wasteful number, since it uses less digits than its factorization.

12111330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149 (or 135 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 12111330 is about 3480.1336181245. The cubic root of 12111330 is about 229.6486759776.

Adding to 12111330 its reverse (3311121), we get a palindrome (15422451).

The spelling of 12111330 in words is "twelve million, one hundred eleven thousand, three hundred thirty".