21243263711 has 8 divisors (see below), whose sum is σ = 21425103360. Its totient is φ = 21061651968.

The previous prime is 21243263693. The next prime is 21243263719. The reversal of 21243263711 is 11736234212.

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 21243263711 - 2⁶ = 21243263647 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 (21243263719) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132935 + ... + 245271.

It is an arithmetic number, because the mean of its divisors is an integer number (2678137920).

Almost surely, 2^21243263711 is an apocalyptic number.

21243263711 is a deficient number, since it is larger than the sum of its proper divisors (181839649).

21243263711 is a wasteful number, since it uses less digits than its factorization.

21243263711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113953.

The product of its digits is 12096, while the sum is 32.

Adding to 21243263711 its reverse (11736234212), we get a palindrome (32979497923).

The spelling of 21243263711 in words is "twenty-one billion, two hundred forty-three million, two hundred sixty-three thousand, seven hundred eleven".