111001000001001 has 16 divisors (see below), whose sum is σ = 161507732288448. Its totient is φ = 67251778214400.

The previous prime is 111001000000993. The next prime is 111001000001057. The reversal of 111001000001001 is 100100000100111.

It is not a de Polignac number, because 111001000001001 - 2³ = 111001000000993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111001000001501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 538773436 + ... + 538979421.

It is an arithmetic number, because the mean of its divisors is an integer number (10094233268028).

Almost surely, 2^{111001000001001} is an apocalyptic number.

111001000001001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111001000001001 is a deficient number, since it is larger than the sum of its proper divisors (50506732287447).

111001000001001 is a wasteful number, since it uses less digits than its factorization.

111001000001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077755992.

The product of its (nonzero) digits is 1, while the sum is 6.

Adding to 111001000001001 its reverse (100100000100111), we get a palindrome (211101000101112).

It can be divided in two parts, 11 and 1001000001001, that multiplied together give a palindrome (11011000011011).

The spelling of 111001000001001 in words is "one hundred eleven trillion, one billion, one thousand, one".