12171023777512 has 32 divisors (see below), whose sum is σ = 22842146124000. Its totient is φ = 6079787492800.

The previous prime is 12171023777489. The next prime is 12171023777531. The reversal of 12171023777512 is 21577732017121.

12171023777512 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 36616239 + ... + 36947137.

It is an arithmetic number, because the mean of its divisors is an integer number (713817066375).

Almost surely, 2^{12171023777512} is an apocalyptic number.

It is an amenable number.

12171023777512 is a deficient number, since it is larger than the sum of its proper divisors (10671122346488).

12171023777512 is a wasteful number, since it uses less digits than its factorization.

12171023777512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335217 (or 335213 counting only the distinct ones).

The product of its (nonzero) digits is 288120, while the sum is 46.

The spelling of 12171023777512 in words is "twelve trillion, one hundred seventy-one billion, twenty-three million, seven hundred seventy-seven thousand, five hundred twelve".