21210302013211 has 4 divisors (see below), whose sum is σ = 21210328208272. Its totient is φ = 21210275818152.

The previous prime is 21210302013191. The next prime is 21210302013259. The reversal of 21210302013211 is 11231020301212.

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 21210302013211 - 2¹⁹ = 21210301488923 is a prime.

It is a super-2 number, since 2×21210302013211² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21210302013611) 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, 11842911 + ... + 13515736.

It is an arithmetic number, because the mean of its divisors is an integer number (5302582052068).

Almost surely, 2^{21210302013211} is an apocalyptic number.

21210302013211 is a deficient number, since it is larger than the sum of its proper divisors (26195061).

21210302013211 is an equidigital number, since it uses as much as digits as its factorization.

21210302013211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26195060.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21210302013211 its reverse (11231020301212), we get a palindrome (32441322314423).

The spelling of 21210302013211 in words is "twenty-one trillion, two hundred ten billion, three hundred two million, thirteen thousand, two hundred eleven".