21210010303211 has 4 divisors (see below), whose sum is σ = 21210021904992. Its totient is φ = 21209998701432.

The previous prime is 21210010303169. The next prime is 21210010303243. The reversal of 21210010303211 is 11230301001212.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21210010303211 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21210010303211.

It is not an unprimeable number, because it can be changed into a prime (21210010306211) 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, 2390180 + ... + 6937793.

It is an arithmetic number, because the mean of its divisors is an integer number (5302505476248).

Almost surely, 2^{21210010303211} is an apocalyptic number.

21210010303211 is a deficient number, since it is larger than the sum of its proper divisors (11601781).

21210010303211 is an equidigital number, since it uses as much as digits as its factorization.

21210010303211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11601780.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21210010303211 its reverse (11230301001212), we get a palindrome (32440311304423).

The spelling of 21210010303211 in words is "twenty-one trillion, two hundred ten billion, ten million, three hundred three thousand, two hundred eleven".