111101111125 has 16 divisors (see below), whose sum is σ = 138739975920. Its totient is φ = 88825896000.

The previous prime is 111101111123. The next prime is 111101111137. The reversal of 111101111125 is 521111101111.

It can be written as a sum of positive squares in 8 ways, for example, as 18104778916 + 92996332209 = 134554^2 + 304953^2 .

It is not a de Polignac number, because 111101111125 - 2¹ = 111101111123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111101111099 and 111101111108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111101111123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71530 + ... + 476779.

It is an arithmetic number, because the mean of its divisors is an integer number (8671248495).

Almost surely, 2^111101111125 is an apocalyptic number.

It is an amenable number.

111101111125 is a deficient number, since it is larger than the sum of its proper divisors (27638864795).

111101111125 is an equidigital number, since it uses as much as digits as its factorization.

111101111125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549945 (or 549935 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 16.

Adding to 111101111125 its reverse (521111101111), we get a palindrome (632212212236).

The spelling of 111101111125 in words is "one hundred eleven billion, one hundred one million, one hundred eleven thousand, one hundred twenty-five".