121012799328 has 288 divisors, whose sum is σ = 364284490752. Its totient is φ = 38054016000.

The previous prime is 121012799291. The next prime is 121012799329. The reversal of 121012799328 is 823997210121.

121012799328 is a `hidden beast` number, since 1 + 210 + 1 + 27 + 99 + 328 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121012799329) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 60414775 + ... + 60416777.

It is an arithmetic number, because the mean of its divisors is an integer number (1264876704).

Almost surely, 2^121012799328 is an apocalyptic number.

121012799328 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 121012799328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182142245376).

121012799328 is an abundant number, since it is smaller than the sum of its proper divisors (243271691424).

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

121012799328 is a wasteful number, since it uses less digits than its factorization.

121012799328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2218 (or 2207 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The spelling of 121012799328 in words is "one hundred twenty-one billion, twelve million, seven hundred ninety-nine thousand, three hundred twenty-eight".