121698239328 has 144 divisors (see below), whose sum is σ = 351614980080. Its totient is φ = 39921942528.

The previous prime is 121698239323. The next prime is 121698239389. The reversal of 121698239328 is 823932896121.

121698239328 is a `hidden beast` number, since 1 + 21 + 69 + 8 + 239 + 328 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×121698239328² (a number of 23 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121698239323) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4988376 + ... + 5012712.

It is an arithmetic number, because the mean of its divisors is an integer number (2441770695).

Almost surely, 2^121698239328 is an apocalyptic number.

121698239328 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121698239328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (175807490040).

121698239328 is an abundant number, since it is smaller than the sum of its proper divisors (229916740752).

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

121698239328 is a wasteful number, since it uses less digits than its factorization.

121698239328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24629 (or 24618 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 54.

The spelling of 121698239328 in words is "one hundred twenty-one billion, six hundred ninety-eight million, two hundred thirty-nine thousand, three hundred twenty-eight".