12121228 has 18 divisors (see below), whose sum is σ = 24675756. Its totient is φ = 5194728.

The previous prime is 12121211. The next prime is 12121231. The reversal of 12121228 is 82212121.

12121228 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a plaindrome in base 6.

It is a zygodrome in base 6.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30726 + ... + 31117.

Almost surely, 2^12121228 is an apocalyptic number.

It is an amenable number.

12121228 is an abundant number, since it is smaller than the sum of its proper divisors (12554528).

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

12121228 is a wasteful number, since it uses less digits than its factorization.

12121228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61861 (or 61852 counting only the distinct ones).

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

The square root of 12121228 is about 3481.5553995305. Note that the first 3 decimals coincide. The cubic root of 12121228 is about 229.7112191680.

Adding to 12121228 its reverse (82212121), we get a palindrome (94333349).

The spelling of 12121228 in words is "twelve million, one hundred twenty-one thousand, two hundred twenty-eight".