11111616111 has 8 divisors (see below), whose sum is σ = 15160034560. Its totient is φ = 7235470872.

The previous prime is 11111616097. The next prime is 11111616127. The reversal of 11111616111 is 11161611111.

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

It is not a de Polignac number, because 11111616111 - 2¹⁰ = 11111615087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111615111) 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, 43068151 + ... + 43068408.

It is an arithmetic number, because the mean of its divisors is an integer number (1895004320).

Almost surely, 2^11111616111 is an apocalyptic number.

11111616111 is a deficient number, since it is larger than the sum of its proper divisors (4048418449).

11111616111 is an equidigital number, since it uses as much as digits as its factorization.

11111616111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86136605.

The product of its digits is 36, while the sum is 21.

Subtracting 11111616111 from its reverse (11161611111), we obtain a triangular number (49995000 = T₉₉₉₉).

It can be divided in two parts, 11 and 111616111, that multiplied together give a palindrome (1227777221).

The spelling of 11111616111 in words is "eleven billion, one hundred eleven million, six hundred sixteen thousand, one hundred eleven".