118720221 has 4 divisors (see below), whose sum is σ = 158293632. Its totient is φ = 79146812.

The previous prime is 118720211. The next prime is 118720237. The reversal of 118720221 is 122027811.

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 118720221 - 2⁶ = 118720157 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 118720191 and 118720200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118720201) 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, 19786701 + ... + 19786706.

It is an arithmetic number, because the mean of its divisors is an integer number (39573408).

Almost surely, 2^118720221 is an apocalyptic number.

It is an amenable number.

118720221 is a deficient number, since it is larger than the sum of its proper divisors (39573411).

118720221 is an equidigital number, since it uses as much as digits as its factorization.

118720221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39573410.

The product of its (nonzero) digits is 448, while the sum is 24.

The square root of 118720221 is about 10895.8809189528. The cubic root of 118720221 is about 491.4826962513.

The spelling of 118720221 in words is "one hundred eighteen million, seven hundred twenty thousand, two hundred twenty-one".