121533152832 has 336 divisors, whose sum is σ = 451311020160. Its totient is φ = 30365466624.

The previous prime is 121533152809. The next prime is 121533152849. The reversal of 121533152832 is 238251335121.

121533152832 is a `hidden beast` number, since 1 + 21 + 53 + 31 + 528 + 32 = 666.

121533152832 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (336).

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

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, 934888 + ... + 1056920.

It is an arithmetic number, because the mean of its divisors is an integer number (1343187560).

Almost surely, 2^121533152832 is an apocalyptic number.

121533152832 is a gapful number since it is divisible by the number (12) 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 121533152832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (225655510080).

121533152832 is an abundant number, since it is smaller than the sum of its proper divisors (329777867328).

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

121533152832 is a wasteful number, since it uses less digits than its factorization.

121533152832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122090 (or 122077 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

Adding to 121533152832 its reverse (238251335121), we get a palindrome (359784487953).

The spelling of 121533152832 in words is "one hundred twenty-one billion, five hundred thirty-three million, one hundred fifty-two thousand, eight hundred thirty-two".