12120402543600 has 120 divisors (see below), whose sum is σ = 41812281033712. Its totient is φ = 2983483699200.

The previous prime is 12120402543577. The next prime is 12120402543607. The reversal of 12120402543600 is 634520402121.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120402543607) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 388458841 + ... + 388490040.

Almost surely, 2^{12120402543600} is an apocalyptic number.

12120402543600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12120402543600 is an abundant number, since it is smaller than the sum of its proper divisors (29691878490112).

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

12120402543600 is a wasteful number, since it uses less digits than its factorization.

12120402543600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776948915 (or 776948904 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

Adding to 12120402543600 its reverse (634520402121), we get a palindrome (12754922945721).

The spelling of 12120402543600 in words is "twelve trillion, one hundred twenty billion, four hundred two million, five hundred forty-three thousand, six hundred".