121543684032 has 28 divisors (see below), whose sum is σ = 321584331176. Its totient is φ = 40514561280.

The previous prime is 121543684013. The next prime is 121543684039. The reversal of 121543684032 is 230486345121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121543684039) 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 3 ways as a sum of consecutive naturals, for example, 316519819 + ... + 316520202.

Almost surely, 2^121543684032 is an apocalyptic number.

121543684032 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121543684032 is an abundant number, since it is smaller than the sum of its proper divisors (200040647144).

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

121543684032 is an equidigital number, since it uses as much as digits as its factorization.

121543684032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633040036 (or 633040026 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 39.

The spelling of 121543684032 in words is "one hundred twenty-one billion, five hundred forty-three million, six hundred eighty-four thousand, thirty-two".