12001243879620 has 192 divisors, whose sum is σ = 38137875148800. Its totient is φ = 3131725057920.

The previous prime is 12001243879619. The next prime is 12001243879697. The reversal of 12001243879620 is 2697834210021.

12001243879620 is a `hidden beast` number, since 1 + 2 + 0 + 0 + 12 + 4 + 3 + 8 + 7 + 9 + 620 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 168969915 + ... + 169040925.

It is an arithmetic number, because the mean of its divisors is an integer number (198634766400).

Almost surely, 2^{12001243879620} is an apocalyptic number.

12001243879620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12001243879620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19068937574400).

12001243879620 is an abundant number, since it is smaller than the sum of its proper divisors (26136631269180).

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

12001243879620 is a wasteful number, since it uses less digits than its factorization.

12001243879620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77735 (or 77727 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 12001243879620 in words is "twelve trillion, one billion, two hundred forty-three million, eight hundred seventy-nine thousand, six hundred twenty".