121332128 has 24 divisors (see below), whose sum is σ = 252925092. Its totient is φ = 57097216.

The previous prime is 121332121. The next prime is 121332191. The reversal of 121332128 is 821233121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 120736144 + 595984 = 10988^2 + 772^2 .

It is not an unprimeable number, because it can be changed into a prime (121332121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110975 + ... + 112062.

Almost surely, 2^121332128 is an apocalyptic number.

It is an amenable number.

121332128 is an abundant number, since it is smaller than the sum of its proper divisors (131592964).

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

121332128 is a wasteful number, since it uses less digits than its factorization.

121332128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223064 (or 223056 counting only the distinct ones).

The product of its digits is 576, while the sum is 23.

The square root of 121332128 is about 11015.0863818674. The cubic root of 121332128 is about 495.0608747363.

Adding to 121332128 its reverse (821233121), we get a palindrome (942565249).

The spelling of 121332128 in words is "one hundred twenty-one million, three hundred thirty-two thousand, one hundred twenty-eight".