212311111003 has 4 divisors (see below), whose sum is σ = 212728225680. Its totient is φ = 211893996328.

The previous prime is 212311110961. The next prime is 212311111073. The reversal of 212311111003 is 300111113212.

It is a happy number.

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-212311111003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212311111073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208556575 + ... + 208557592.

It is an arithmetic number, because the mean of its divisors is an integer number (53182056420).

Almost surely, 2^212311111003 is an apocalyptic number.

212311111003 is a deficient number, since it is larger than the sum of its proper divisors (417114677).

212311111003 is an equidigital number, since it uses as much as digits as its factorization.

212311111003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417114676.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 212311111003 its reverse (300111113212), we get a palindrome (512422224215).

The spelling of 212311111003 in words is "two hundred twelve billion, three hundred eleven million, one hundred eleven thousand, three".