12311120 has 20 divisors (see below), whose sum is σ = 28623540. Its totient is φ = 4924416.

The previous prime is 12311119. The next prime is 12311137. The reversal of 12311120 is 2111321.

It can be written as a sum of positive squares in 2 ways, for example, as 9461776 + 2849344 = 3076^2 + 1688^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 76865 + ... + 77024.

It is an arithmetic number, because the mean of its divisors is an integer number (1431177).

Almost surely, 2^12311120 is an apocalyptic number.

12311120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12311120 is an abundant number, since it is smaller than the sum of its proper divisors (16312420).

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

12311120 is a wasteful number, since it uses less digits than its factorization.

12311120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153902 (or 153896 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 12311120 is about 3508.7205645363. The cubic root of 12311120 is about 230.9045663144.

Adding to 12311120 its reverse (2111321), we get a palindrome (14422441).

The spelling of 12311120 in words is "twelve million, three hundred eleven thousand, one hundred twenty".