111001111101001 has 8 divisors (see below), whose sum is σ = 121092460635744. Its totient is φ = 100909818138720.

The previous prime is 111001111100977. The next prime is 111001111101031. The reversal of 111001111101001 is 100101111100111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111001111101001 - 2¹⁵ = 111001111068233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111001111101031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9987436 + ... + 17937421.

It is an arithmetic number, because the mean of its divisors is an integer number (15136557579468).

Almost surely, 2^{111001111101001} is an apocalyptic number.

111001111101001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111001111101001 is a deficient number, since it is larger than the sum of its proper divisors (10091349534743).

111001111101001 is a wasteful number, since it uses less digits than its factorization.

111001111101001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28286231.

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

Adding to 111001111101001 its reverse (100101111100111), we get a palindrome (211102222201112).

The spelling of 111001111101001 in words is "one hundred eleven trillion, one billion, one hundred eleven million, one hundred one thousand, one".