121535533 has 32 divisors (see below), whose sum is σ = 158112000. Its totient is φ = 92800512.

The previous prime is 121535509. The next prime is 121535539. The reversal of 121535533 is 335535121.

It is not a de Polignac number, because 121535533 - 2¹⁷ = 121404461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121535539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 110241 + ... + 111337.

It is an arithmetic number, because the mean of its divisors is an integer number (4941000).

Almost surely, 2^121535533 is an apocalyptic number.

It is an amenable number.

121535533 is a deficient number, since it is larger than the sum of its proper divisors (36576467).

121535533 is a wasteful number, since it uses less digits than its factorization.

121535533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1154 (or 1140 counting only the distinct ones).

The product of its digits is 6750, while the sum is 28.

The square root of 121535533 is about 11024.3155343087. The cubic root of 121535533 is about 495.3373655010.

The spelling of 121535533 in words is "one hundred twenty-one million, five hundred thirty-five thousand, five hundred thirty-three".