21132344311 has 4 divisors (see below), whose sum is σ = 22757909272. Its totient is φ = 19506779352.

The previous prime is 21132344287. The next prime is 21132344327. The reversal of 21132344311 is 11344323112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21132344311 - 2⁵ = 21132344279 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 (21132344351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 812782461 + ... + 812782486.

It is an arithmetic number, because the mean of its divisors is an integer number (5689477318).

Almost surely, 2^21132344311 is an apocalyptic number.

21132344311 is a deficient number, since it is larger than the sum of its proper divisors (1625564961).

21132344311 is a wasteful number, since it uses less digits than its factorization.

21132344311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1625564960.

The product of its digits is 1728, while the sum is 25.

Adding to 21132344311 its reverse (11344323112), we get a palindrome (32476667423).

The spelling of 21132344311 in words is "twenty-one billion, one hundred thirty-two million, three hundred forty-four thousand, three hundred eleven".