118516121 has 2 divisors, whose sum is σ = 118516122. Its totient is φ = 118516120.

The previous prime is 118516081. The next prime is 118516133. The reversal of 118516121 is 121615811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116877721 + 1638400 = 10811^2 + 1280^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118516121 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (118516621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59258060 + 59258061.

It is an arithmetic number, because the mean of its divisors is an integer number (59258061).

Almost surely, 2^118516121 is an apocalyptic number.

It is an amenable number.

118516121 is a deficient number, since it is larger than the sum of its proper divisors (1).

118516121 is an equidigital number, since it uses as much as digits as its factorization.

118516121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 480, while the sum is 26.

The square root of 118516121 is about 10886.5109654104. The cubic root of 118516121 is about 491.2008875962.

The spelling of 118516121 in words is "one hundred eighteen million, five hundred sixteen thousand, one hundred twenty-one".