305116121 has 4 divisors (see below), whose sum is σ = 306879972. Its totient is φ = 303352272.

The previous prime is 305116111. The next prime is 305116139. The reversal of 305116121 is 121611503.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 116877721 + 188238400 = 10811^2 + 13720^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-305116121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 305116093 and 305116102.

It is not an unprimeable number, because it can be changed into a prime (305116111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 881666 + ... + 882011.

It is an arithmetic number, because the mean of its divisors is an integer number (76719993).

Almost surely, 2^305116121 is an apocalyptic number.

It is an amenable number.

305116121 is a deficient number, since it is larger than the sum of its proper divisors (1763851).

305116121 is a wasteful number, since it uses less digits than its factorization.

305116121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1763850.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 305116121 is about 17467.5734147591. The cubic root of 305116121 is about 673.2169647987.

Adding to 305116121 its reverse (121611503), we get a palindrome (426727624).

The spelling of 305116121 in words is "three hundred five million, one hundred sixteen thousand, one hundred twenty-one".