2111311003 has 4 divisors (see below), whose sum is σ = 2117292408. Its totient is φ = 2105329600.

The previous prime is 2111311001. The next prime is 2111311009. The reversal of 2111311003 is 3001131112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2111311003 - 2¹ = 2111311001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2111311001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2990173 + ... + 2990878.

It is an arithmetic number, because the mean of its divisors is an integer number (529323102).

Almost surely, 2^2111311003 is an apocalyptic number.

2111311003 is a deficient number, since it is larger than the sum of its proper divisors (5981405).

2111311003 is an equidigital number, since it uses as much as digits as its factorization.

2111311003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5981404.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 2111311003 is about 45949.0043744149. The cubic root of 2111311003 is about 1282.8741977878.

Adding to 2111311003 its reverse (3001131112), we get a palindrome (5112442115).

The spelling of 2111311003 in words is "two billion, one hundred eleven million, three hundred eleven thousand, three".