21212010110211 has 16 divisors (see below), whose sum is σ = 28380157344000. Its totient is φ = 14092618850208.

The previous prime is 21212010110201. The next prime is 21212010110227. The reversal of 21212010110211 is 11201101021212.

It is a happy number.

It is not a de Polignac number, because 21212010110211 - 2⁶ = 21212010110147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21212010110201) 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 15 ways as a sum of consecutive naturals, for example, 2720490 + ... + 7058688.

It is an arithmetic number, because the mean of its divisors is an integer number (1773759834000).

Almost surely, 2^{21212010110211} is an apocalyptic number.

21212010110211 is a deficient number, since it is larger than the sum of its proper divisors (7168147233789).

21212010110211 is a wasteful number, since it uses less digits than its factorization.

21212010110211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4343818.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21212010110211 its reverse (11201101021212), we get a palindrome (32413111131423).

The spelling of 21212010110211 in words is "twenty-one trillion, two hundred twelve billion, ten million, one hundred ten thousand, two hundred eleven".