21344044311 has 12 divisors (see below), whose sum is σ = 30860554920. Its totient is φ = 14215392720.

The previous prime is 21344044277. The next prime is 21344044333. The reversal of 21344044311 is 11344044312.

21344044311 is a `hidden beast` number, since 2 + 1 + 344 + 0 + 4 + 4 + 311 = 666.

It is not a de Polignac number, because 21344044311 - 2¹¹ = 21344042263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21344044411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1154500 + ... + 1172841.

It is an arithmetic number, because the mean of its divisors is an integer number (2571712910).

Almost surely, 2^21344044311 is an apocalyptic number.

21344044311 is a deficient number, since it is larger than the sum of its proper divisors (9516510609).

21344044311 is a wasteful number, since it uses less digits than its factorization.

21344044311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2328366 (or 2328363 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 21344044311 its reverse (11344044312), we get a palindrome (32688088623).

Subtracting from 21344044311 its reverse (11344044312), we obtain a palindrome (9999999999).

The spelling of 21344044311 in words is "twenty-one billion, three hundred forty-four million, forty-four thousand, three hundred eleven".