121665118 has 8 divisors (see below), whose sum is σ = 182674800. Its totient is φ = 60773520.

The previous prime is 121665097. The next prime is 121665119. The reversal of 121665118 is 811566121.

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

It is a self number, because there is not a number n which added to its sum of digits gives 121665118.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121665119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26898 + ... + 31093.

It is an arithmetic number, because the mean of its divisors is an integer number (22834350).

Almost surely, 2^121665118 is an apocalyptic number.

121665118 is a deficient number, since it is larger than the sum of its proper divisors (61009682).

121665118 is a wasteful number, since it uses less digits than its factorization.

121665118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59042.

The product of its digits is 2880, while the sum is 31.

The square root of 121665118 is about 11030.1912041451. The cubic root of 121665118 is about 495.5133510509.

The spelling of 121665118 in words is "one hundred twenty-one million, six hundred sixty-five thousand, one hundred eighteen".