21124231213311 has 6 divisors (see below), whose sum is σ = 30512778419240. Its totient is φ = 14082820808868.

The previous prime is 21124231213307. The next prime is 21124231213361. The reversal of 21124231213311 is 11331213242112.

21124231213311 is a `hidden beast` number, since 2 + 1 + 1 + 24 + 2 + 312 + 13 + 311 = 666.

It is not a de Polignac number, because 21124231213311 - 2² = 21124231213307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21124231213361) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1173568400731 + ... + 1173568400748.

Almost surely, 2^{21124231213311} is an apocalyptic number.

21124231213311 is a deficient number, since it is larger than the sum of its proper divisors (9388547205929).

21124231213311 is a wasteful number, since it uses less digits than its factorization.

21124231213311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2347136801485 (or 2347136801482 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

Adding to 21124231213311 its reverse (11331213242112), we get a palindrome (32455444455423).

The spelling of 21124231213311 in words is "twenty-one trillion, one hundred twenty-four billion, two hundred thirty-one million, two hundred thirteen thousand, three hundred eleven".