118181321 has 2 divisors, whose sum is σ = 118181322. Its totient is φ = 118181320.

The previous prime is 118181309. The next prime is 118181333. The reversal of 118181321 is 123181811.

It is a balanced prime because it is at equal distance from previous prime (118181309) and next prime (118181333).

It can be written as a sum of positive squares in only one way, i.e., 64320400 + 53860921 = 8020^2 + 7339^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118181321 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (118181341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59090660 + 59090661.

It is an arithmetic number, because the mean of its divisors is an integer number (59090661).

Almost surely, 2^118181321 is an apocalyptic number.

It is an amenable number.

118181321 is a deficient number, since it is larger than the sum of its proper divisors (1).

118181321 is an equidigital number, since it uses as much as digits as its factorization.

118181321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 384, while the sum is 26.

The square root of 118181321 is about 10871.1232630304. The cubic root of 118181321 is about 490.7379149743.

The spelling of 118181321 in words is "one hundred eighteen million, one hundred eighty-one thousand, three hundred twenty-one".