118210121 has 2 divisors, whose sum is σ = 118210122. Its totient is φ = 118210120.

The previous prime is 118210073. The next prime is 118210151. The reversal of 118210121 is 121012811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87684496 + 30525625 = 9364^2 + 5525^2 .

It is an emirp because it is prime and its reverse (121012811) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118210121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 118210121.

It is not a weakly prime, because it can be changed into another prime (118210151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59105060 + 59105061.

It is an arithmetic number, because the mean of its divisors is an integer number (59105061).

Almost surely, 2^118210121 is an apocalyptic number.

It is an amenable number.

118210121 is a deficient number, since it is larger than the sum of its proper divisors (1).

118210121 is an equidigital number, since it uses as much as digits as its factorization.

118210121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 17.

The square root of 118210121 is about 10872.4477924707. The cubic root of 118210121 is about 490.7777749226. Note that the first 5 decimals are identical.

Adding to 118210121 its reverse (121012811), we get a palindrome (239222932).

The spelling of 118210121 in words is "one hundred eighteen million, two hundred ten thousand, one hundred twenty-one".