21324402211 has 16 divisors (see below), whose sum is σ = 25036804800. Its totient is φ = 17781073920.

The previous prime is 21324402199. The next prime is 21324402241. The reversal of 21324402211 is 11220442312.

It is a cyclic number.

It is not a de Polignac number, because 21324402211 - 2²⁵ = 21290847779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21324402241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6286 + ... + 206611.

It is an arithmetic number, because the mean of its divisors is an integer number (1564800300).

Almost surely, 2^21324402211 is an apocalyptic number.

21324402211 is a deficient number, since it is larger than the sum of its proper divisors (3712402589).

21324402211 is a wasteful number, since it uses less digits than its factorization.

21324402211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213294.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 21324402211 its reverse (11220442312), we get a palindrome (32544844523).

The spelling of 21324402211 in words is "twenty-one billion, three hundred twenty-four million, four hundred two thousand, two hundred eleven".