121146665 has 8 divisors (see below), whose sum is σ = 145496520. Its totient is φ = 96836992.

The previous prime is 121146637. The next prime is 121146689. The reversal of 121146665 is 566641121.

It can be written as a sum of positive squares in 4 ways, for example, as 46635241 + 74511424 = 6829^2 + 8632^2 .

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 121146665 - 2⁸ = 121146409 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 2954 + ... + 15843.

It is an arithmetic number, because the mean of its divisors is an integer number (18187065).

Almost surely, 2^121146665 is an apocalyptic number.

It is an amenable number.

121146665 is a deficient number, since it is larger than the sum of its proper divisors (24349855).

121146665 is a wasteful number, since it uses less digits than its factorization.

121146665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20091.

The product of its digits is 8640, while the sum is 32.

The square root of 121146665 is about 11006.6645719764. The cubic root of 121146665 is about 494.8085032828.

Adding to 121146665 its reverse (566641121), we get a palindrome (687787786).

The spelling of 121146665 in words is "one hundred twenty-one million, one hundred forty-six thousand, six hundred sixty-five".