118805021 has 2 divisors, whose sum is σ = 118805022. Its totient is φ = 118805020.

The previous prime is 118804997. The next prime is 118805033. The reversal of 118805021 is 120508811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116402521 + 2402500 = 10789^2 + 1550^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118805021 is a prime.

It is a super-2 number, since 2×118805021² = 28229266029620882, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118805221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59402510 + 59402511.

It is an arithmetic number, because the mean of its divisors is an integer number (59402511).

Almost surely, 2^118805021 is an apocalyptic number.

It is an amenable number.

118805021 is a deficient number, since it is larger than the sum of its proper divisors (1).

118805021 is an equidigital number, since it uses as much as digits as its factorization.

118805021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 640, while the sum is 26.

The square root of 118805021 is about 10899.7716031117. The cubic root of 118805021 is about 491.5996878724.

The spelling of 118805021 in words is "one hundred eighteen million, eight hundred five thousand, twenty-one".