111110111001001 has 4 divisors (see below), whose sum is σ = 126982984001152. Its totient is φ = 95237238000852.

The previous prime is 111110111000957. The next prime is 111110111001017. The reversal of 111110111001001 is 100100111011111.

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.

It is a cyclic number.

It is not a de Polignac number, because 111110111001001 - 2²³ = 111110102612393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111110111011001) 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, 7936436500065 + ... + 7936436500078.

It is an arithmetic number, because the mean of its divisors is an integer number (31745746000288).

Almost surely, 2^{111110111001001} is an apocalyptic number.

It is an amenable number.

111110111001001 is a deficient number, since it is larger than the sum of its proper divisors (15872873000151).

111110111001001 is an equidigital number, since it uses as much as digits as its factorization.

111110111001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15872873000150.

The product of its (nonzero) digits is 1, while the sum is 10.

Adding to 111110111001001 its reverse (100100111011111), we get a palindrome (211210222012112).

The spelling of 111110111001001 in words is "one hundred eleven trillion, one hundred ten billion, one hundred eleven million, one thousand, one".