111001001001001 has 8 divisors (see below), whose sum is σ = 111097742923584. Its totient is φ = 110904297744240.

The previous prime is 111001001000951. The next prime is 111001001001029. The reversal of 111001001001001 is 100100100100111.

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 111001001001001 - 2²¹ = 111000998903849 is a prime.

It is a Duffinian number.

111001001001001 is a modest number, since divided by 1001001 gives 111001 as remainder.

It is not an unprimeable number, because it can be changed into a prime (111001001001901) 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, 3920911 + ... + 15406996.

It is an arithmetic number, because the mean of its divisors is an integer number (13887217865448).

Almost surely, 2^{111001001001001} is an apocalyptic number.

It is an amenable number.

111001001001001 is a deficient number, since it is larger than the sum of its proper divisors (96741922583).

111001001001001 is a wasteful number, since it uses less digits than its factorization.

111001001001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19332911.

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

Adding to 111001001001001 its reverse (100100100100111), we get a palindrome (211101101101112).

It can be divided in two parts, 11 and 1001001001001, that multiplied together give a palindrome (11011011011011).

The spelling of 111001001001001 in words is "one hundred eleven trillion, one billion, one million, one thousand, one".