12129817328140 has 48 divisors (see below), whose sum is σ = 26296069766400. Its totient is φ = 4695099575040.

The previous prime is 12129817328113. The next prime is 12129817328143. The reversal of 12129817328140 is 4182371892121.

It is not an unprimeable number, because it can be changed into a prime (12129817328143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8746654 + ... + 10038106.

It is an arithmetic number, because the mean of its divisors is an integer number (547834786800).

Almost surely, 2^{12129817328140} is an apocalyptic number.

12129817328140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12129817328140 is an abundant number, since it is smaller than the sum of its proper divisors (14166252438260).

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

12129817328140 is a wasteful number, since it uses less digits than its factorization.

12129817328140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1306642 (or 1306640 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 49.

The spelling of 12129817328140 in words is "twelve trillion, one hundred twenty-nine billion, eight hundred seventeen million, three hundred twenty-eight thousand, one hundred forty".