12011320 has 32 divisors (see below), whose sum is σ = 27604800. Its totient is φ = 4701568.

The previous prime is 12011317. The next prime is 12011323. The reversal of 12011320 is 2311021.

It is an interprime number because it is at equal distance from previous prime (12011317) and next prime (12011323).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 12011297 and 12011306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011323) 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 7 ways as a sum of consecutive naturals, for example, 1315 + ... + 5074.

It is an arithmetic number, because the mean of its divisors is an integer number (862650).

Almost surely, 2^12011320 is an apocalyptic number.

12011320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12011320 is an abundant number, since it is smaller than the sum of its proper divisors (15593480).

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

12011320 is a wasteful number, since it uses less digits than its factorization.

12011320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6447 (or 6443 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 12011320 is about 3465.7351312528. The cubic root of 12011320 is about 229.0148156925.

Adding to 12011320 its reverse (2311021), we get a palindrome (14322341).

The spelling of 12011320 in words is "twelve million, eleven thousand, three hundred twenty".