111110001001 has 4 divisors (see below), whose sum is σ = 111112099072. Its totient is φ = 111107902932.

The previous prime is 111110000999. The next prime is 111110001031. The reversal of 111110001001 is 100100011111.

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: 100100011111 = 2179 ⋅45938509.

It is a cyclic number.

It is not a de Polignac number, because 111110001001 - 2¹ = 111110000999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111110001031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 967485 + ... + 1076218.

It is an arithmetic number, because the mean of its divisors is an integer number (27778024768).

Almost surely, 2^111110001001 is an apocalyptic number.

It is an amenable number.

111110001001 is a deficient number, since it is larger than the sum of its proper divisors (2098071).

111110001001 is an equidigital number, since it uses as much as digits as its factorization.

111110001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2098070.

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

Adding to 111110001001 its reverse (100100011111), we get a palindrome (211210012112).

The spelling of 111110001001 in words is "one hundred eleven billion, one hundred ten million, one thousand, one".