21022002211 has 16 divisors (see below), whose sum is σ = 25304431360. Its totient is φ = 17060505120.

The previous prime is 21022002181. The next prime is 21022002271. The reversal of 21022002211 is 11220022012.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21022002211 - 2¹¹ = 21022000163 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21022002191 and 21022002200.

It is not an unprimeable number, because it can be changed into a prime (21022002271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 186160 + ... + 276946.

It is an arithmetic number, because the mean of its divisors is an integer number (1581526960).

Almost surely, 2^21022002211 is an apocalyptic number.

21022002211 is a deficient number, since it is larger than the sum of its proper divisors (4282429149).

21022002211 is a wasteful number, since it uses less digits than its factorization.

21022002211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92554.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21022002211 its reverse (11220022012), we get a palindrome (32242024223).

The spelling of 21022002211 in words is "twenty-one billion, twenty-two million, two thousand, two hundred eleven".