12281113 has 4 divisors (see below), whose sum is σ = 13225828. Its totient is φ = 11336400.

The previous prime is 12281111. The next prime is 12281117. The reversal of 12281113 is 31118221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5890329 + 6390784 = 2427^2 + 2528^2 .

It is a cyclic number.

It is not a de Polignac number, because 12281113 - 2¹ = 12281111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12281111) 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 3 ways as a sum of consecutive naturals, for example, 472338 + ... + 472363.

It is an arithmetic number, because the mean of its divisors is an integer number (3306457).

Almost surely, 2^12281113 is an apocalyptic number.

12281113 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12281113 is a deficient number, since it is larger than the sum of its proper divisors (944715).

12281113 is an equidigital number, since it uses as much as digits as its factorization.

12281113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944714.

The product of its digits is 96, while the sum is 19.

The square root of 12281113 is about 3504.4418956519. The cubic root of 12281113 is about 230.7168121996.

Adding to 12281113 its reverse (31118221), we get a palindrome (43399334).

The spelling of 12281113 in words is "twelve million, two hundred eighty-one thousand, one hundred thirteen".