11211112111 has 8 divisors (see below), whose sum is σ = 12386702304. Its totient is φ = 10092867840.

The previous prime is 11211112097. The next prime is 11211112139. The reversal of 11211112111 is 11121111211.

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 11211112111 - 2⁵ = 11211112079 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11211112091 and 11211112100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211119111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14336070 + ... + 14336851.

It is an arithmetic number, because the mean of its divisors is an integer number (1548337788).

Almost surely, 2^11211112111 is an apocalyptic number.

11211112111 is a deficient number, since it is larger than the sum of its proper divisors (1175590193).

11211112111 is a wasteful number, since it uses less digits than its factorization.

11211112111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28672961.

The product of its digits is 4, while the sum is 13.

Adding to 11211112111 its reverse (11121111211), we get a palindrome (22332223322).

The spelling of 11211112111 in words is "eleven billion, two hundred eleven million, one hundred twelve thousand, one hundred eleven".