121540455205434 has 64 divisors (see below), whose sum is σ = 276917427924480. Its totient is φ = 39491070013440.

The previous prime is 121540455205391. The next prime is 121540455205439. The reversal of 121540455205434 is 434502554045121.

121540455205434 is a `hidden beast` number, since 1 + 2 + 1 + 5 + 4 + 0 + 4 + 5 + 5 + 205 + 434 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 121540455205434.

It is not an unprimeable number, because it can be changed into a prime (121540455205439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21253122 + ... + 26358605.

It is an arithmetic number, because the mean of its divisors is an integer number (4326834811320).

Almost surely, 2^{121540455205434} is an apocalyptic number.

121540455205434 is an abundant number, since it is smaller than the sum of its proper divisors (155376972719046).

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

121540455205434 is a wasteful number, since it uses less digits than its factorization.

121540455205434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47612932 (or 47612926 counting only the distinct ones).

The product of its (nonzero) digits is 1920000, while the sum is 45.

The spelling of 121540455205434 in words is "one hundred twenty-one trillion, five hundred forty billion, four hundred fifty-five million, two hundred five thousand, four hundred thirty-four".