111111110011001 has 8 divisors (see below), whose sum is σ = 111299343037344. Its totient is φ = 110922879887680.

The previous prime is 111111110010977. The next prime is 111111110011067. The reversal of 111111110011001 is 100110011111111.

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 111111110011001 - 2²⁶ = 111111042902137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (111111110011091) 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, 84317750 + ... + 85625376.

It is an arithmetic number, because the mean of its divisors is an integer number (13912417879668).

Almost surely, 2^{111111110011001} is an apocalyptic number.

It is an amenable number.

111111110011001 is a deficient number, since it is larger than the sum of its proper divisors (188233026343).

111111110011001 is a wasteful number, since it uses less digits than its factorization.

111111110011001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1451511.

The product of its (nonzero) digits is 1, while the sum is 11.

Adding to 111111110011001 its reverse (100110011111111), we get a palindrome (211221121122112).

It can be divided in two parts, 1111111 and 10011001, that multiplied together give a palindrome (11123333332111).

The spelling of 111111110011001 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred ten million, eleven thousand, one".