121717755756 has 48 divisors (see below), whose sum is σ = 315693571200. Its totient is φ = 40555997136.

The previous prime is 121717755697. The next prime is 121717755773. The reversal of 121717755756 is 657557717121.

121717755756 is a `hidden beast` number, since 1 + 2 + 17 + 1 + 77 + 557 + 5 + 6 = 666.

121717755756 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×121717755756² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 36411 + ... + 494733.

It is an arithmetic number, because the mean of its divisors is an integer number (6576949400).

Almost surely, 2^121717755756 is an apocalyptic number.

It is an amenable number.

121717755756 is an abundant number, since it is smaller than the sum of its proper divisors (193975815444).

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

121717755756 is a wasteful number, since it uses less digits than its factorization.

121717755756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460795 (or 460787 counting only the distinct ones).

The product of its digits is 3601500, while the sum is 54.

The spelling of 121717755756 in words is "one hundred twenty-one billion, seven hundred seventeen million, seven hundred fifty-five thousand, seven hundred fifty-six".