121535552240 has 80 divisors (see below), whose sum is σ = 283640952960. Its totient is φ = 48430356480.

The previous prime is 121535552233. The next prime is 121535552311. The reversal of 121535552240 is 42255535121.

It is a happy number.

121535552240 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 (80).

It is a self number, because there is not a number n which added to its sum of digits gives 121535552240.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 27892142 + ... + 27896498.

It is an arithmetic number, because the mean of its divisors is an integer number (3545511912).

Almost surely, 2^121535552240 is an apocalyptic number.

121535552240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121535552240 is an abundant number, since it is smaller than the sum of its proper divisors (162105400720).

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

121535552240 is a wasteful number, since it uses less digits than its factorization.

121535552240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5610 (or 5604 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 35.

The spelling of 121535552240 in words is "one hundred twenty-one billion, five hundred thirty-five million, five hundred fifty-two thousand, two hundred forty".