12021038836 has 24 divisors (see below), whose sum is σ = 21130712064. Its totient is φ = 5983723680.

The previous prime is 12021038779. The next prime is 12021038863. The reversal of 12021038836 is 63883012021.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2218066 + ... + 2223478.

It is an arithmetic number, because the mean of its divisors is an integer number (880446336).

Almost surely, 2^12021038836 is an apocalyptic number.

It is an amenable number.

12021038836 is a deficient number, since it is larger than the sum of its proper divisors (9109673228).

12021038836 is a wasteful number, since it uses less digits than its factorization.

12021038836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7791 (or 7789 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The spelling of 12021038836 in words is "twelve billion, twenty-one million, thirty-eight thousand, eight hundred thirty-six".