121752105500 has 48 divisors (see below), whose sum is σ = 267847673184. Its totient is φ = 48345334400.

The previous prime is 121752105481. The next prime is 121752105521. The reversal of 121752105500 is 5501257121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 820202 + ... + 957201.

It is an arithmetic number, because the mean of its divisors is an integer number (5580159858).

Almost surely, 2^121752105500 is an apocalyptic number.

121752105500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121752105500 is an abundant number, since it is smaller than the sum of its proper divisors (146095567684).

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

121752105500 is a wasteful number, since it uses less digits than its factorization.

121752105500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1777559 (or 1777547 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 29.

The spelling of 121752105500 in words is "one hundred twenty-one billion, seven hundred fifty-two million, one hundred five thousand, five hundred".