118221013 has 2 divisors, whose sum is σ = 118221014. Its totient is φ = 118221012.

The previous prime is 118221001. The next prime is 118221053. The reversal of 118221013 is 310122811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63712324 + 54508689 = 7982^2 + 7383^2 .

It is a cyclic number.

It is not a de Polignac number, because 118221013 - 2¹⁷ = 118089941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118221053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59110506 + 59110507.

It is an arithmetic number, because the mean of its divisors is an integer number (59110507).

Almost surely, 2^118221013 is an apocalyptic number.

It is an amenable number.

118221013 is a deficient number, since it is larger than the sum of its proper divisors (1).

118221013 is an equidigital number, since it uses as much as digits as its factorization.

118221013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 19.

The square root of 118221013 is about 10872.9486800959. The cubic root of 118221013 is about 490.7928480464.

Adding to 118221013 its reverse (310122811), we get a palindrome (428343824).

The spelling of 118221013 in words is "one hundred eighteen million, two hundred twenty-one thousand, thirteen".