111131113123 has 2 divisors, whose sum is σ = 111131113124. Its totient is φ = 111131113122.

The previous prime is 111131113109. The next prime is 111131113201. The reversal of 111131113123 is 321311131111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111131113123 - 2⁹ = 111131112611 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111131113123.

It is not a weakly prime, because it can be changed into another prime (111131713123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55565556561 + 55565556562.

It is an arithmetic number, because the mean of its divisors is an integer number (55565556562).

Almost surely, 2^111131113123 is an apocalyptic number.

111131113123 is a deficient number, since it is larger than the sum of its proper divisors (1).

111131113123 is an equidigital number, since it uses as much as digits as its factorization.

111131113123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54, while the sum is 19.

Adding to 111131113123 its reverse (321311131111), we get a palindrome (432442244234).

The spelling of 111131113123 in words is "one hundred eleven billion, one hundred thirty-one million, one hundred thirteen thousand, one hundred twenty-three".