12228881 has 12 divisors (see below), whose sum is σ = 14369472. Its totient is φ = 10375848.

The previous prime is 12228869. The next prime is 12228889. The reversal of 12228881 is 18882221.

It is a de Polignac number, because none of the positive numbers 2^k-12228881 is a prime.

It is a super-2 number, since 2×12228881² = 299091061024322, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (12228889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3836 + ... + 6258.

It is an arithmetic number, because the mean of its divisors is an integer number (1197456).

Almost surely, 2^12228881 is an apocalyptic number.

It is an amenable number.

12228881 is a deficient number, since it is larger than the sum of its proper divisors (2140591).

12228881 is a wasteful number, since it uses less digits than its factorization.

12228881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2540 (or 2533 counting only the distinct ones).

The product of its digits is 4096, while the sum is 32.

The square root of 12228881 is about 3496.9816985509. The cubic root of 12228881 is about 230.3892651992.

The spelling of 12228881 in words is "twelve million, two hundred twenty-eight thousand, eight hundred eighty-one".