121992126240 has 96 divisors (see below), whose sum is σ = 386206531200. Its totient is φ = 32367734784.

The previous prime is 121992126211. The next prime is 121992126251. The reversal of 121992126240 is 42621299121.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 543049 + ... + 734088.

It is an arithmetic number, because the mean of its divisors is an integer number (4022984700).

Almost surely, 2^121992126240 is an apocalyptic number.

121992126240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121992126240 is an abundant number, since it is smaller than the sum of its proper divisors (264214404960).

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

121992126240 is a wasteful number, since it uses less digits than its factorization.

121992126240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1277354 (or 1277346 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 39.

The spelling of 121992126240 in words is "one hundred twenty-one billion, nine hundred ninety-two million, one hundred twenty-six thousand, two hundred forty".