111111111122111 has 8 divisors (see below), whose sum is σ = 111265935453600. Its totient is φ = 110956336898400.

The previous prime is 111111111122093. The next prime is 111111111122161. The reversal of 111111111122111 is 111221111111111.

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 111111111122111 - 2²⁶ = 111111044013247 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 111111111122111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111111111122161) 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, 8087876 + ... + 16959833.

It is an arithmetic number, because the mean of its divisors is an integer number (13908241931700).

Almost surely, 2^{111111111122111} is an apocalyptic number.

111111111122111 is a deficient number, since it is larger than the sum of its proper divisors (154824331489).

111111111122111 is an equidigital number, since it uses as much as digits as its factorization.

111111111122111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25053889.

The product of its digits is 4, while the sum is 17.

Adding to 111111111122111 its reverse (111221111111111), we get a palindrome (222332222233222).

It can be divided in two parts, 1111111 and 11122111, that multiplied together give a palindrome (12357899875321).

The spelling of 111111111122111 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred eleven million, one hundred twenty-two thousand, one hundred eleven".