305117201111111 has 4 divisors (see below), whose sum is σ = 305117271620400. Its totient is φ = 305117130601824.

The previous prime is 305117201111033. The next prime is 305117201111137. The reversal of 305117201111111 is 111111102711503.

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

It is a cyclic number.

It is not a de Polignac number, because 305117201111111 - 2¹⁰ = 305117201110087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305117201111011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28307291 + ... + 37570428.

It is an arithmetic number, because the mean of its divisors is an integer number (76279317905100).

Almost surely, 2^{305117201111111} is an apocalyptic number.

305117201111111 is a deficient number, since it is larger than the sum of its proper divisors (70509289).

305117201111111 is an equidigital number, since it uses as much as digits as its factorization.

305117201111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70509288.

The product of its (nonzero) digits is 210, while the sum is 26.

Adding to 305117201111111 its reverse (111111102711503), we get a palindrome (416228303822614).

The spelling of 305117201111111 in words is "three hundred five trillion, one hundred seventeen billion, two hundred one million, one hundred eleven thousand, one hundred eleven".