111110421503 has 2 divisors, whose sum is σ = 111110421504. Its totient is φ = 111110421502.

The previous prime is 111110421421. The next prime is 111110421517. The reversal of 111110421503 is 305124011111.

It is a strong prime.

It is an emirp because it is prime and its reverse (305124011111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111110421503 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111110421203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55555210751 + 55555210752.

It is an arithmetic number, because the mean of its divisors is an integer number (55555210752).

Almost surely, 2^111110421503 is an apocalyptic number.

111110421503 is a deficient number, since it is larger than the sum of its proper divisors (1).

111110421503 is an equidigital number, since it uses as much as digits as its factorization.

111110421503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 20.

Adding to 111110421503 its reverse (305124011111), we get a palindrome (416234432614).

The spelling of 111110421503 in words is "one hundred eleven billion, one hundred ten million, four hundred twenty-one thousand, five hundred three".