21201100220011 has 4 divisors (see below), whose sum is σ = 21201132621024. Its totient is φ = 21201067819000.

The previous prime is 21201100219997. The next prime is 21201100220023. The reversal of 21201100220011 is 11002200110212.

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 21201100220011 - 2⁴¹ = 19002076964459 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21201100219973 and 21201100220000.

It is not an unprimeable number, because it can be changed into a prime (21201100220051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15198340 + ... + 16534561.

It is an arithmetic number, because the mean of its divisors is an integer number (5300283155256).

Almost surely, 2^{21201100220011} is an apocalyptic number.

21201100220011 is a deficient number, since it is larger than the sum of its proper divisors (32401013).

21201100220011 is an equidigital number, since it uses as much as digits as its factorization.

21201100220011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32401012.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21201100220011 its reverse (11002200110212), we get a palindrome (32203300330223).

The spelling of 21201100220011 in words is "twenty-one trillion, two hundred one billion, one hundred million, two hundred twenty thousand, eleven".