11111111101003 has 2 divisors, whose sum is σ = 11111111101004. Its totient is φ = 11111111101002.

The previous prime is 11111111101001. The next prime is 11111111101099. The reversal of 11111111101003 is 30010111111111.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11111111101003 - 2¹ = 11111111101001 is a prime.

Together with 11111111101001, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (11111111101001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555555550501 + 5555555550502.

It is an arithmetic number, because the mean of its divisors is an integer number (5555555550502).

Almost surely, 2^{11111111101003} is an apocalyptic number.

11111111101003 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111111101003 is an equidigital number, since it uses as much as digits as its factorization.

11111111101003 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 13.

Adding to 11111111101003 its reverse (30010111111111), we get a palindrome (41121222212114).

The spelling of 11111111101003 in words is "eleven trillion, one hundred eleven billion, one hundred eleven million, one hundred one thousand, three".