12172976987228 has 12 divisors (see below), whose sum is σ = 21362048754480. Its totient is φ = 6069534485952.

The previous prime is 12172976987203. The next prime is 12172976987261. The reversal of 12172976987228 is 82278967927121.

12172976987228 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4238500301 + ... + 4238503172.

It is an arithmetic number, because the mean of its divisors is an integer number (1780170729540).

Almost surely, 2^{12172976987228} is an apocalyptic number.

It is an amenable number.

12172976987228 is a deficient number, since it is larger than the sum of its proper divisors (9189071767252).

12172976987228 is a wasteful number, since it uses less digits than its factorization.

12172976987228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8477003836 (or 8477003834 counting only the distinct ones).

The product of its digits is 170698752, while the sum is 71.

The spelling of 12172976987228 in words is "twelve trillion, one hundred seventy-two billion, nine hundred seventy-six million, nine hundred eighty-seven thousand, two hundred twenty-eight".