21244334311 has 8 divisors (see below), whose sum is σ = 21699696384. Its totient is φ = 20789112120.

The previous prime is 21244334299. The next prime is 21244334347. The reversal of 21244334311 is 11343344212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21244334311 - 2⁷ = 21244334183 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21244334311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21244334611) 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 7 ways as a sum of consecutive naturals, for example, 307576 + ... + 370258.

It is an arithmetic number, because the mean of its divisors is an integer number (2712462048).

Almost surely, 2^21244334311 is an apocalyptic number.

21244334311 is a deficient number, since it is larger than the sum of its proper divisors (455362073).

21244334311 is an equidigital number, since it uses as much as digits as its factorization.

21244334311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69941.

The product of its digits is 6912, while the sum is 28.

Adding to 21244334311 its reverse (11343344212), we get a palindrome (32587678523).

Subtracting from 21244334311 its reverse (11343344212), we obtain a palindrome (9900990099).

The spelling of 21244334311 in words is "twenty-one billion, two hundred forty-four million, three hundred thirty-four thousand, three hundred eleven".