111125244121 has 6 divisors (see below), whose sum is σ = 117281767722. Its totient is φ = 105276546720.

The previous prime is 111125244091. The next prime is 111125244127. The reversal of 111125244121 is 121442521111.

It can be written as a sum of positive squares in only one way, i.e., 111112888896 + 12355225 = 333336^2 + 3515^2 .

It is not a de Polignac number, because 111125244121 - 2⁹ = 111125243609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111125244127) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 153912720 + ... + 153913441.

It is an arithmetic number, because the mean of its divisors is an integer number (19546961287).

Almost surely, 2^111125244121 is an apocalyptic number.

It is an amenable number.

111125244121 is a deficient number, since it is larger than the sum of its proper divisors (6156523601).

111125244121 is an equidigital number, since it uses as much as digits as its factorization.

111125244121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307826199 (or 307826180 counting only the distinct ones).

The product of its digits is 640, while the sum is 25.

Adding to 111125244121 its reverse (121442521111), we get a palindrome (232567765232).

The spelling of 111125244121 in words is "one hundred eleven billion, one hundred twenty-five million, two hundred forty-four thousand, one hundred twenty-one".