21221110200011 has 4 divisors (see below), whose sum is σ = 21221120216832. Its totient is φ = 21221100183192.

The previous prime is 21221110199987. The next prime is 21221110200113. The reversal of 21221110200011 is 11000201112212.

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 not a de Polignac number, because 21221110200011 - 2³⁴ = 21203930330827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21221110200811) 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, 443996 + ... + 6529881.

It is an arithmetic number, because the mean of its divisors is an integer number (5305280054208).

Almost surely, 2^{21221110200011} is an apocalyptic number.

21221110200011 is a deficient number, since it is larger than the sum of its proper divisors (10016821).

21221110200011 is an equidigital number, since it uses as much as digits as its factorization.

21221110200011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10016820.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21221110200011 its reverse (11000201112212), we get a palindrome (32221311312223).

The spelling of 21221110200011 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred ten million, two hundred thousand, eleven".