12281122 has 8 divisors (see below), whose sum is σ = 21053376. Its totient is φ = 5263332.

The previous prime is 12281117. The next prime is 12281131. The reversal of 12281122 is 22118221.

12281122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 12281122.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 438598 + ... + 438625.

It is an arithmetic number, because the mean of its divisors is an integer number (2631672).

Almost surely, 2^12281122 is an apocalyptic number.

12281122 is a deficient number, since it is larger than the sum of its proper divisors (8772254).

12281122 is an equidigital number, since it uses as much as digits as its factorization.

12281122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 877232.

The product of its digits is 128, while the sum is 19.

The square root of 12281122 is about 3504.4431797363. The cubic root of 12281122 is about 230.7168685585.

Adding to 12281122 its reverse (22118221), we get a palindrome (34399343).

It can be divided in two parts, 12281 and 122, that added together give a triangular number (12403 = T₁₅₇).

The spelling of 12281122 in words is "twelve million, two hundred eighty-one thousand, one hundred twenty-two".