111100011001 has 4 divisors (see below), whose sum is σ = 126971441152. Its totient is φ = 95228580852.

The previous prime is 111100010999. The next prime is 111100011023. The reversal of 111100011001 is 100110001111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 100110001111 = 92489 ⋅1082399.

It is a cyclic number.

It is not a de Polignac number, because 111100011001 - 2¹ = 111100010999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (7), and also a Moran number because the ratio is a prime number: 15871430143 = 111100011001 / (1 + 1 + 1 + 1 + 0 + 0 + 0 + 1 + 1 + 0 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111100051001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7935715065 + ... + 7935715078.

It is an arithmetic number, because the mean of its divisors is an integer number (31742860288).

Almost surely, 2^111100011001 is an apocalyptic number.

It is an amenable number.

111100011001 is a deficient number, since it is larger than the sum of its proper divisors (15871430151).

111100011001 is an equidigital number, since it uses as much as digits as its factorization.

111100011001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15871430150.

The product of its (nonzero) digits is 1, while the sum is 7.

Adding to 111100011001 its reverse (100110001111), we get a palindrome (211210012112).

The spelling of 111100011001 in words is "one hundred eleven billion, one hundred million, eleven thousand, one".