121717755755 has 8 divisors (see below), whose sum is σ = 147821082192. Its totient is φ = 96201021088.

The previous prime is 121717755697. The next prime is 121717755773. The reversal of 121717755755 is 557557717121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121717755755 - 2¹⁶ = 121717690219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121717755697 and 121717755706.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146647484 + ... + 146648313.

It is an arithmetic number, because the mean of its divisors is an integer number (18477635274).

Almost surely, 2^121717755755 is an apocalyptic number.

121717755755 is a deficient number, since it is larger than the sum of its proper divisors (26103326437).

121717755755 is an equidigital number, since it uses as much as digits as its factorization.

121717755755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293295885.

The product of its digits is 3001250, while the sum is 53.

The spelling of 121717755755 in words is "one hundred twenty-one billion, seven hundred seventeen million, seven hundred fifty-five thousand, seven hundred fifty-five".