111521104 has 10 divisors (see below), whose sum is σ = 216072170. Its totient is φ = 55760544.

The previous prime is 111521101. The next prime is 111521141. The reversal of 111521104 is 401125111.

It can be written as a sum of positive squares in only one way, i.e., 111344704 + 176400 = 10552^2 + 420^2 .

It is a Harshad number since it is a multiple of its sum of digits (16), and also a Moran number because the ratio is a prime number: 6970069 = 111521104 / (1 + 1 + 1 + 5 + 2 + 1 + 1 + 0 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111521101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3485019 + ... + 3485050.

It is an arithmetic number, because the mean of its divisors is an integer number (21607217).

Almost surely, 2^111521104 is an apocalyptic number.

It is an amenable number.

111521104 is a deficient number, since it is larger than the sum of its proper divisors (104551066).

111521104 is an equidigital number, since it uses as much as digits as its factorization.

111521104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6970077 (or 6970071 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 16.

The square root of 111521104 is about 10560.3552970532. The cubic root of 111521104 is about 481.3404430230.

Adding to 111521104 its reverse (401125111), we get a palindrome (512646215).

The spelling of 111521104 in words is "one hundred eleven million, five hundred twenty-one thousand, one hundred four".