121718705 has 16 divisors (see below), whose sum is σ = 148721664. Its totient is φ = 95618880.

The previous prime is 121718689. The next prime is 121718719. The reversal of 121718705 is 507817121.

It is not a de Polignac number, because 121718705 - 2⁴ = 121718689 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64475 + ... + 66335.

It is an arithmetic number, because the mean of its divisors is an integer number (9295104).

Almost surely, 2^121718705 is an apocalyptic number.

It is an amenable number.

121718705 is a deficient number, since it is larger than the sum of its proper divisors (27002959).

121718705 is a wasteful number, since it uses less digits than its factorization.

121718705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2096.

The product of its (nonzero) digits is 3920, while the sum is 32.

The square root of 121718705 is about 11032.6200424015. The cubic root of 121718705 is about 495.5860894466.

The spelling of 121718705 in words is "one hundred twenty-one million, seven hundred eighteen thousand, seven hundred five".