111001110101001 has 40 divisors (see below), whose sum is σ = 165907718142144. Its totient is φ = 73960030735200.

The previous prime is 111001110100999. The next prime is 111001110101017. The reversal of 111001110101001 is 100101011100111.

It is not a de Polignac number, because 111001110101001 - 2¹ = 111001110100999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (111001110101041) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1111061151 + ... + 1111161051.

Almost surely, 2^{111001110101001} is an apocalyptic number.

It is an amenable number.

111001110101001 is a deficient number, since it is larger than the sum of its proper divisors (54906608041143).

111001110101001 is an equidigital number, since it uses as much as digits as its factorization.

111001110101001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107323 (or 107314 counting only the distinct ones).

The product of its (nonzero) digits is 1, while the sum is 9.

Adding to 111001110101001 its reverse (100101011100111), we get a palindrome (211102121201112).

The spelling of 111001110101001 in words is "one hundred eleven trillion, one billion, one hundred ten million, one hundred one thousand, one".