121719984 has 40 divisors (see below), whose sum is σ = 317240112. Its totient is φ = 40212480.

The previous prime is 121719967. The next prime is 121719991. The reversal of 121719984 is 489917121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5797 + ... + 16644.

Almost surely, 2^121719984 is an apocalyptic number.

It is an amenable number.

121719984 is an abundant number, since it is smaller than the sum of its proper divisors (195520128).

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

121719984 is a wasteful number, since it uses less digits than its factorization.

121719984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22565 (or 22559 counting only the distinct ones).

The product of its digits is 36288, while the sum is 42.

The square root of 121719984 is about 11032.6780067217. The cubic root of 121719984 is about 495.5878252860.

It can be divided in two parts, 12171 and 9984, that added together give a triangular number (22155 = T₂₁₀).

The spelling of 121719984 in words is "one hundred twenty-one million, seven hundred nineteen thousand, nine hundred eighty-four".