121561024984 has 16 divisors (see below), whose sum is σ = 260487910800. Its totient is φ = 52097582112.

The previous prime is 121561024973. The next prime is 121561025021. The reversal of 121561024984 is 489420165121.

It is a self number, because there is not a number n which added to its sum of digits gives 121561024984.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 1085366239 + ... + 1085366350.

It is an arithmetic number, because the mean of its divisors is an integer number (16280494425).

Almost surely, 2^121561024984 is an apocalyptic number.

121561024984 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

121561024984 is an abundant number, since it is smaller than the sum of its proper divisors (138926885816).

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

121561024984 is a wasteful number, since it uses less digits than its factorization.

121561024984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2170732602 (or 2170732598 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 43.

The spelling of 121561024984 in words is "one hundred twenty-one billion, five hundred sixty-one million, twenty-four thousand, nine hundred eighty-four".