111525124105 has 4 divisors (see below), whose sum is σ = 133830148932. Its totient is φ = 89220099280.

The previous prime is 111525124093. The next prime is 111525124121. The reversal of 111525124105 is 501421525111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 501421525111 = 13 ⋅38570886547.

It can be written as a sum of positive squares in 2 ways, for example, as 65207197449 + 46317926656 = 255357^2 + 215216^2 .

It is not a de Polignac number, because 111525124105 - 2⁷ = 111525123977 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 11152512406 + ... + 11152512415.

It is an arithmetic number, because the mean of its divisors is an integer number (33457537233).

Almost surely, 2^111525124105 is an apocalyptic number.

It is an amenable number.

111525124105 is a deficient number, since it is larger than the sum of its proper divisors (22305024827).

111525124105 is an equidigital number, since it uses as much as digits as its factorization.

111525124105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22305024826.

The product of its (nonzero) digits is 2000, while the sum is 28.

Adding to 111525124105 its reverse (501421525111), we get a palindrome (612946649216).

The spelling of 111525124105 in words is "one hundred eleven billion, five hundred twenty-five million, one hundred twenty-four thousand, one hundred five".