118270021 has 2 divisors, whose sum is σ = 118270022. Its totient is φ = 118270020.

The previous prime is 118270013. The next prime is 118270039. The reversal of 118270021 is 120072811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72437121 + 45832900 = 8511^2 + 6770^2 .

It is a cyclic number.

It is not a de Polignac number, because 118270021 - 2³ = 118270013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 118269974 and 118270001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118273021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59135010 + 59135011.

It is an arithmetic number, because the mean of its divisors is an integer number (59135011).

Almost surely, 2^118270021 is an apocalyptic number.

It is an amenable number.

118270021 is a deficient number, since it is larger than the sum of its proper divisors (1).

118270021 is an equidigital number, since it uses as much as digits as its factorization.

118270021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 22.

The square root of 118270021 is about 10875.2021130644. The cubic root of 118270021 is about 490.8606573481.

The spelling of 118270021 in words is "one hundred eighteen million, two hundred seventy thousand, twenty-one".