121389352484544 has 448 divisors, whose sum is σ = 363185829888000. Its totient is φ = 39753272918016.

The previous prime is 121389352484513. The next prime is 121389352484549. The reversal of 121389352484544 is 445484253983121.

121389352484544 is a `hidden beast` number, since 1 + 2 + 1 + 3 + 8 + 9 + 3 + 5 + 2 + 4 + 84 + 544 = 666.

It is not an unprimeable number, because it can be changed into a prime (121389352484549) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 13717856632 + ... + 13717865480.

It is an arithmetic number, because the mean of its divisors is an integer number (810682656000).

Almost surely, 2^{121389352484544} 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 121389352484544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181592914944000).

121389352484544 is an abundant number, since it is smaller than the sum of its proper divisors (241796477403456).

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

121389352484544 is a wasteful number, since it uses less digits than its factorization.

121389352484544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9557 (or 9541 counting only the distinct ones).

The product of its digits is 132710400, while the sum is 63.

The spelling of 121389352484544 in words is "one hundred twenty-one trillion, three hundred eighty-nine billion, three hundred fifty-two million, four hundred eighty-four thousand, five hundred forty-four".