12281123 has 12 divisors (see below), whose sum is σ = 13483080. Its totient is φ = 11147136.

The previous prime is 12281117. The next prime is 12281131. The reversal of 12281123 is 32118221.

It is not a de Polignac number, because 12281123 - 2¹⁴ = 12264739 is a prime.

It is a super-2 number, since 2×12281123² = 301651964282258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12281095 and 12281104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12281173) 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 11 ways as a sum of consecutive naturals, for example, 13868 + ... + 14726.

It is an arithmetic number, because the mean of its divisors is an integer number (1123590).

Almost surely, 2^12281123 is an apocalyptic number.

12281123 is a deficient number, since it is larger than the sum of its proper divisors (1201957).

12281123 is an equidigital number, since it uses as much as digits as its factorization.

12281123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934 (or 905 counting only the distinct ones).

The product of its digits is 192, while the sum is 20.

The square root of 12281123 is about 3504.4433224123. The cubic root of 12281123 is about 230.7168748206.

Adding to 12281123 its reverse (32118221), we get a palindrome (44399344).

The spelling of 12281123 in words is "twelve million, two hundred eighty-one thousand, one hundred twenty-three".