21241444411 has 16 divisors (see below), whose sum is σ = 23693539968. Its totient is φ = 18880992000.

The previous prime is 21241444391. The next prime is 21241444417. The reversal of 21241444411 is 11444414212.

It is a cyclic number.

It is not a de Polignac number, because 21241444411 - 2¹³ = 21241436219 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 21241444411.

It is not an unprimeable number, because it can be changed into a prime (21241444417) 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, 31365 + ... + 208486.

It is an arithmetic number, because the mean of its divisors is an integer number (1480846248).

Almost surely, 2^21241444411 is an apocalyptic number.

21241444411 is a deficient number, since it is larger than the sum of its proper divisors (2452095557).

21241444411 is a wasteful number, since it uses less digits than its factorization.

21241444411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240042.

The product of its digits is 4096, while the sum is 28.

Adding to 21241444411 its reverse (11444414212), we get a palindrome (32685858623).

The spelling of 21241444411 in words is "twenty-one billion, two hundred forty-one million, four hundred forty-four thousand, four hundred eleven".