118660021 has 4 divisors (see below), whose sum is σ = 118683232. Its totient is φ = 118636812.

The previous prime is 118659979. The next prime is 118660049. The reversal of 118660021 is 120066811.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 118660021 - 2¹⁹ = 118135733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118660121) 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, 201 + ... + 15406.

It is an arithmetic number, because the mean of its divisors is an integer number (29670808).

Almost surely, 2^118660021 is an apocalyptic number.

It is an amenable number.

118660021 is a deficient number, since it is larger than the sum of its proper divisors (23211).

118660021 is an equidigital number, since it uses as much as digits as its factorization.

118660021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23210.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 118660021 is about 10893.1180568284. The cubic root of 118660021 is about 491.3996094207.

The spelling of 118660021 in words is "one hundred eighteen million, six hundred sixty thousand, twenty-one".