121804342255584 has 384 divisors, whose sum is σ = 377657546273280. Its totient is φ = 38061192978432.

The previous prime is 121804342255553. The next prime is 121804342255613. The reversal of 121804342255584 is 485552243408121.

121804342255584 is a `hidden beast` number, since 1 + 2 + 1 + 8 + 0 + 4 + 3 + 4 + 2 + 2 + 55 + 584 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 121804342255584.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8723357787 + ... + 8723371749.

It is an arithmetic number, because the mean of its divisors is an integer number (983483193420).

Almost surely, 2^{121804342255584} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121804342255584, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188828773136640).

121804342255584 is an abundant number, since it is smaller than the sum of its proper divisors (255853204017696).

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

121804342255584 is a wasteful number, since it uses less digits than its factorization.

121804342255584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16319 (or 16305 counting only the distinct ones).

The product of its (nonzero) digits is 12288000, while the sum is 54.

The spelling of 121804342255584 in words is "one hundred twenty-one trillion, eight hundred four billion, three hundred forty-two million, two hundred fifty-five thousand, five hundred eighty-four".