12120535617040 has 80 divisors (see below), whose sum is σ = 28614949026048. Its totient is φ = 4773652835328.

The previous prime is 12120535617031. The next prime is 12120535617053. The reversal of 12120535617040 is 4071653502121.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1660249 + ... + 5195911.

Almost surely, 2^{12120535617040} is an apocalyptic number.

12120535617040 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 12120535617040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14307474513024).

12120535617040 is an abundant number, since it is smaller than the sum of its proper divisors (16494413409008).

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

12120535617040 is a wasteful number, since it uses less digits than its factorization.

12120535617040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3536336 (or 3536330 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 37.

The spelling of 12120535617040 in words is "twelve trillion, one hundred twenty billion, five hundred thirty-five million, six hundred seventeen thousand, forty".