211311112303 has 4 divisors (see below), whose sum is σ = 211854328920. Its totient is φ = 210767895688.

The previous prime is 211311112273. The next prime is 211311112319. The reversal of 211311112303 is 303211113112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211311112303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211311112393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271607725 + ... + 271608502.

It is an arithmetic number, because the mean of its divisors is an integer number (52963582230).

Almost surely, 2^211311112303 is an apocalyptic number.

211311112303 is a deficient number, since it is larger than the sum of its proper divisors (543216617).

211311112303 is an equidigital number, since it uses as much as digits as its factorization.

211311112303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543216616.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 211311112303 its reverse (303211113112), we get a palindrome (514522225415).

The spelling of 211311112303 in words is "two hundred eleven billion, three hundred eleven million, one hundred twelve thousand, three hundred three".