121545530568 has 288 divisors, whose sum is σ = 432151200000. Its totient is φ = 30481355520.

The previous prime is 121545530537. The next prime is 121545530569. The reversal of 121545530568 is 865035545121.

121545530568 is a `hidden beast` number, since 1 + 2 + 1 + 5 + 4 + 55 + 30 + 568 = 666.

It is not an unprimeable number, because it can be changed into a prime (121545530569) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1071433 + ... + 1179431.

It is an arithmetic number, because the mean of its divisors is an integer number (1500525000).

Almost surely, 2^121545530568 is an apocalyptic number.

121545530568 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 121545530568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216075600000).

121545530568 is an abundant number, since it is smaller than the sum of its proper divisors (310605669432).

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

121545530568 is a wasteful number, since it uses less digits than its factorization.

121545530568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108065 (or 108051 counting only the distinct ones).

The product of its (nonzero) digits is 720000, while the sum is 45.

The spelling of 121545530568 in words is "one hundred twenty-one billion, five hundred forty-five million, five hundred thirty thousand, five hundred sixty-eight".