111131113111 has 4 divisors (see below), whose sum is σ = 111608070912. Its totient is φ = 110654155312.

The previous prime is 111131113109. The next prime is 111131113123. The reversal of 111131113111 is 111311131111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111311131111 = 11959 ⋅9307729.

It is a cyclic number.

It is not a de Polignac number, because 111131113111 - 2¹ = 111131113109 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 (111131113211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 238478551 + ... + 238479016.

It is an arithmetic number, because the mean of its divisors is an integer number (27902017728).

Almost surely, 2^111131113111 is an apocalyptic number.

111131113111 is a deficient number, since it is larger than the sum of its proper divisors (476957801).

111131113111 is an equidigital number, since it uses as much as digits as its factorization.

111131113111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476957800.

The product of its digits is 9, while the sum is 16.

Adding to 111131113111 its reverse (111311131111), we get a palindrome (222442244222).

The spelling of 111131113111 in words is "one hundred eleven billion, one hundred thirty-one million, one hundred thirteen thousand, one hundred eleven".