111346520309 has 4 divisors (see below), whose sum is σ = 111381092460. Its totient is φ = 111311948160.

The previous prime is 111346520291. The next prime is 111346520333. The reversal of 111346520309 is 903025643111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 903025643111 = 2203 ⋅409907237.

It can be written as a sum of positive squares in 2 ways, for example, as 77434192900 + 33912327409 = 278270^2 + 184153^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111346520309 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 (111346520359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17281244 + ... + 17287685.

It is an arithmetic number, because the mean of its divisors is an integer number (27845273115).

Almost surely, 2^111346520309 is an apocalyptic number.

It is an amenable number.

111346520309 is a deficient number, since it is larger than the sum of its proper divisors (34572151).

111346520309 is an equidigital number, since it uses as much as digits as its factorization.

111346520309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34572150.

The product of its (nonzero) digits is 19440, while the sum is 35.

The spelling of 111346520309 in words is "one hundred eleven billion, three hundred forty-six million, five hundred twenty thousand, three hundred nine".