111345123503 has 2 divisors, whose sum is σ = 111345123504. Its totient is φ = 111345123502.

The previous prime is 111345123481. The next prime is 111345123509. The reversal of 111345123503 is 305321543111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111345123503 - 2²⁰ = 111344074927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111345123509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55672561751 + 55672561752.

It is an arithmetic number, because the mean of its divisors is an integer number (55672561752).

Almost surely, 2^111345123503 is an apocalyptic number.

111345123503 is a deficient number, since it is larger than the sum of its proper divisors (1).

111345123503 is an equidigital number, since it uses as much as digits as its factorization.

111345123503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 29.

Adding to 111345123503 its reverse (305321543111), we get a palindrome (416666666614).

The spelling of 111345123503 in words is "one hundred eleven billion, three hundred forty-five million, one hundred twenty-three thousand, five hundred three".