21220200011 has 4 divisors (see below), whose sum is σ = 21904722624. Its totient is φ = 20535677400.

The previous prime is 21220199927. The next prime is 21220200017. The reversal of 21220200011 is 11000202212.

It is a happy number.

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 21220200011 - 2¹⁸ = 21219937867 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21220199965 and 21220200001.

It is not an unprimeable number, because it can be changed into a prime (21220200017) 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, 342261260 + ... + 342261321.

It is an arithmetic number, because the mean of its divisors is an integer number (5476180656).

Almost surely, 2^21220200011 is an apocalyptic number.

21220200011 is a deficient number, since it is larger than the sum of its proper divisors (684522613).

21220200011 is an equidigital number, since it uses as much as digits as its factorization.

21220200011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684522612.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21220200011 its reverse (11000202212), we get a palindrome (32220402223).

The spelling of 21220200011 in words is "twenty-one billion, two hundred twenty million, two hundred thousand, eleven".