121232105568 has 384 divisors, whose sum is σ = 410557593600. Its totient is φ = 34089486336.

The previous prime is 121232105549. The next prime is 121232105569. The reversal of 121232105568 is 865501232121.

121232105568 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121232105569) 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, 114046605 + ... + 114047667.

It is an arithmetic number, because the mean of its divisors is an integer number (1069160400).

Almost surely, 2^121232105568 is an apocalyptic number.

121232105568 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 121232105568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (205278796800).

121232105568 is an abundant number, since it is smaller than the sum of its proper divisors (289325488032).

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

121232105568 is a wasteful number, since it uses less digits than its factorization.

121232105568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1371 (or 1357 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

Adding to 121232105568 its reverse (865501232121), we get a palindrome (986733337689).

The spelling of 121232105568 in words is "one hundred twenty-one billion, two hundred thirty-two million, one hundred five thousand, five hundred sixty-eight".