21122200211 has 4 divisors (see below), whose sum is σ = 24139657392. Its totient is φ = 18104743032.

The previous prime is 21122200189. The next prime is 21122200219. The reversal of 21122200211 is 11200222112.

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 21122200211 - 2⁶ = 21122200147 is a prime.

It is a super-2 number, since 2×21122200211² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21122200219) 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, 1508728580 + ... + 1508728593.

It is an arithmetic number, because the mean of its divisors is an integer number (6034914348).

Almost surely, 2^21122200211 is an apocalyptic number.

21122200211 is a deficient number, since it is larger than the sum of its proper divisors (3017457181).

21122200211 is an equidigital number, since it uses as much as digits as its factorization.

21122200211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3017457180.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21122200211 its reverse (11200222112), we get a palindrome (32322422323).

The spelling of 21122200211 in words is "twenty-one billion, one hundred twenty-two million, two hundred thousand, two hundred eleven".