12021968208 has 120 divisors (see below), whose sum is σ = 32249772192. Its totient is φ = 3856978944.

The previous prime is 12021968177. The next prime is 12021968213. The reversal of 12021968208 is 80286912021.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10998510 + ... + 10999602.

Almost surely, 2^12021968208 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 12021968208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16124886096).

12021968208 is an abundant number, since it is smaller than the sum of its proper divisors (20227803984).

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

12021968208 is a wasteful number, since it uses less digits than its factorization.

12021968208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1293 (or 1214 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 39.

The spelling of 12021968208 in words is "twelve billion, twenty-one million, nine hundred sixty-eight thousand, two hundred eight".