118917121 has 8 divisors (see below), whose sum is σ = 121145024. Its totient is φ = 116698320.

The previous prime is 118917109. The next prime is 118917133. The reversal of 118917121 is 121719811.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (118917109) and next prime (118917133).

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 118917121 - 2¹¹ = 118915073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (118917101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27706 + ... + 31708.

It is an arithmetic number, because the mean of its divisors is an integer number (15143128).

Almost surely, 2^118917121 is an apocalyptic number.

It is an amenable number.

118917121 is a deficient number, since it is larger than the sum of its proper divisors (2227903).

118917121 is an equidigital number, since it uses as much as digits as its factorization.

118917121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4551.

The product of its digits is 1008, while the sum is 31.

The square root of 118917121 is about 10904.9127002466. The cubic root of 118917121 is about 491.7542576622.

The spelling of 118917121 in words is "one hundred eighteen million, nine hundred seventeen thousand, one hundred twenty-one".