111111001003 has 2 divisors, whose sum is σ = 111111001004. Its totient is φ = 111111001002.

The previous prime is 111111000991. The next prime is 111111001013. The reversal of 111111001003 is 300100111111.

It is an a-pointer prime, because the next prime (111111001013) can be obtained adding 111111001003 to its sum of digits (10).

It is a strong prime.

It is an emirp because it is prime and its reverse (300100111111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111111001003 is a prime.

It is not a weakly prime, because it can be changed into another prime (111111001013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55555500501 + 55555500502.

It is an arithmetic number, because the mean of its divisors is an integer number (55555500502).

Almost surely, 2^111111001003 is an apocalyptic number.

111111001003 is a deficient number, since it is larger than the sum of its proper divisors (1).

111111001003 is an equidigital number, since it uses as much as digits as its factorization.

111111001003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3, while the sum is 10.

Adding to 111111001003 its reverse (300100111111), we get a palindrome (411211112114).

The spelling of 111111001003 in words is "one hundred eleven billion, one hundred eleven million, one thousand, three".