12021504712 has 128 divisors (see below), whose sum is σ = 28539786240. Its totient is φ = 4629381120.

The previous prime is 12021504707. The next prime is 12021504749. The reversal of 12021504712 is 21740512021.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1831228 + ... + 1837780.

It is an arithmetic number, because the mean of its divisors is an integer number (222967080).

Almost surely, 2^12021504712 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 12021504712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14269893120).

12021504712 is an abundant number, since it is smaller than the sum of its proper divisors (16518281528).

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

12021504712 is a wasteful number, since it uses less digits than its factorization.

12021504712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6671 (or 6667 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The spelling of 12021504712 in words is "twelve billion, twenty-one million, five hundred four thousand, seven hundred twelve".