211213121303 has 4 divisors (see below), whose sum is σ = 211218630480. Its totient is φ = 211207612128.

The previous prime is 211213121299. The next prime is 211213121321. The reversal of 211213121303 is 303121312112.

It is a happy number.

211213121303 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 211213121303 - 2² = 211213121299 is a prime.

It is a super-2 number, since 2×211213121303² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211213181303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2696675 + ... + 2773892.

It is an arithmetic number, because the mean of its divisors is an integer number (52804657620).

Almost surely, 2^211213121303 is an apocalyptic number.

211213121303 is a deficient number, since it is larger than the sum of its proper divisors (5509177).

211213121303 is an equidigital number, since it uses as much as digits as its factorization.

211213121303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5509176.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 211213121303 its reverse (303121312112), we get a palindrome (514334433415).

The spelling of 211213121303 in words is "two hundred eleven billion, two hundred thirteen million, one hundred twenty-one thousand, three hundred three".