121929837568 has 528 divisors, whose sum is σ = 331057216000. Its totient is φ = 44706816000.

The previous prime is 121929837529. The next prime is 121929837637. The reversal of 121929837568 is 865738929121.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 807482293 + ... + 807482443.

Almost surely, 2^121929837568 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 121929837568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165528608000).

121929837568 is an abundant number, since it is smaller than the sum of its proper divisors (209127378432).

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

121929837568 is a wasteful number, since it uses less digits than its factorization.

121929837568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233 (or 190 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 61.

The spelling of 121929837568 in words is "one hundred twenty-one billion, nine hundred twenty-nine million, eight hundred thirty-seven thousand, five hundred sixty-eight".