121188109824 has 100 divisors (see below), whose sum is σ = 361714721544. Its totient is φ = 40396022784.

The previous prime is 121188109817. The next prime is 121188109901. The reversal of 121188109824 is 428901881121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 121188109824.

It is a congruent number.

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 9 ways as a sum of consecutive naturals, for example, 1419612 + ... + 1502555.

Almost surely, 2^121188109824 is an apocalyptic number.

It is an amenable number.

121188109824 is an abundant number, since it is smaller than the sum of its proper divisors (240526611720).

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

121188109824 is an frugal number, since it uses more digits than its factorization.

121188109824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2922197 (or 2922172 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 45.

The spelling of 121188109824 in words is "one hundred twenty-one billion, one hundred eighty-eight million, one hundred nine thousand, eight hundred twenty-four".