121165705 has 8 divisors (see below), whose sum is σ = 145657800. Its totient is φ = 96759936.

The previous prime is 121165691. The next prime is 121165721. The reversal of 121165705 is 507561121.

It can be written as a sum of positive squares in 4 ways, for example, as 627264 + 120538441 = 792^2 + 10979^2 .

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 121165705 - 2⁵ = 121165673 is a prime.

It is a super-3 number, since 3×121165705³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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, 18450 + ... + 24139.

It is an arithmetic number, because the mean of its divisors is an integer number (18207225).

Almost surely, 2^121165705 is an apocalyptic number.

It is an amenable number.

121165705 is a deficient number, since it is larger than the sum of its proper divisors (24492095).

121165705 is an equidigital number, since it uses as much as digits as its factorization.

121165705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43163.

The product of its (nonzero) digits is 2100, while the sum is 28.

The square root of 121165705 is about 11007.5294685047. The cubic root of 121165705 is about 494.8344240965.

The spelling of 121165705 in words is "one hundred twenty-one million, one hundred sixty-five thousand, seven hundred five".