21210012202011 has 16 divisors (see below), whose sum is σ = 28346985139200. Its totient is φ = 14106562259328.

The previous prime is 21210012202009. The next prime is 21210012202039. The reversal of 21210012202011 is 11020221001212.

It is not a de Polignac number, because 21210012202011 - 2¹ = 21210012202009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21210012202111) 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, 2618451 + ... + 7019708.

It is an arithmetic number, because the mean of its divisors is an integer number (1771686571200).

Almost surely, 2^{21210012202011} is an apocalyptic number.

21210012202011 is a deficient number, since it is larger than the sum of its proper divisors (7136972937189).

21210012202011 is a wasteful number, since it uses less digits than its factorization.

21210012202011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9639898.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21210012202011 its reverse (11020221001212), we get a palindrome (32230233203223).

The spelling of 21210012202011 in words is "twenty-one trillion, two hundred ten billion, twelve million, two hundred two thousand, eleven".