12120021208 has 32 divisors (see below), whose sum is σ = 24082166160. Its totient is φ = 5698713600.

The previous prime is 12120021197. The next prime is 12120021209. The reversal of 12120021208 is 80212002121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120021209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126235 + ... + 200437.

Almost surely, 2^12120021208 is an apocalyptic number.

It is an amenable number.

12120021208 is a deficient number, since it is larger than the sum of its proper divisors (11962144952).

12120021208 is a wasteful number, since it uses less digits than its factorization.

12120021208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75427 (or 75423 counting only the distinct ones).

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

Adding to 12120021208 its reverse (80212002121), we get a palindrome (92332023329).

The spelling of 12120021208 in words is "twelve billion, one hundred twenty million, twenty-one thousand, two hundred eight".