12021171715 has 24 divisors (see below), whose sum is σ = 16943528160. Its totient is φ = 8163042048.

The previous prime is 12021171703. The next prime is 12021171781. The reversal of 12021171715 is 51717112021.

It is not a de Polignac number, because 12021171715 - 2⁵ = 12021171683 is a prime.

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, 212950 + ... + 263419.

It is an arithmetic number, because the mean of its divisors is an integer number (705980340).

Almost surely, 2^12021171715 is an apocalyptic number.

12021171715 is a deficient number, since it is larger than the sum of its proper divisors (4922356445).

12021171715 is a wasteful number, since it uses less digits than its factorization.

12021171715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476491 (or 476484 counting only the distinct ones).

The product of its (nonzero) digits is 980, while the sum is 28.

Adding to 12021171715 its reverse (51717112021), we get a palindrome (63738283736).

The spelling of 12021171715 in words is "twelve billion, twenty-one million, one hundred seventy-one thousand, seven hundred fifteen".