12121208 has 32 divisors (see below), whose sum is σ = 24963120. Its totient is φ = 5472000.

The previous prime is 12121157. The next prime is 12121211. The reversal of 12121208 is 80212121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 15548 + ... + 16308.

Almost surely, 2^12121208 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12121208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12481560).

12121208 is an abundant number, since it is smaller than the sum of its proper divisors (12841912).

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

12121208 is a wasteful number, since it uses less digits than its factorization.

12121208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 959 (or 955 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 12121208 is about 3481.5525272499. The cubic root of 12121208 is about 229.7110928270.

Adding to 12121208 its reverse (80212121), we get a palindrome (92333329).

The spelling of 12121208 in words is "twelve million, one hundred twenty-one thousand, two hundred eight".