21132323211 has 8 divisors (see below), whose sum is σ = 28831696960. Its totient is φ = 13760582472.

The previous prime is 21132323207. The next prime is 21132323237. The reversal of 21132323211 is 11232323112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21132323211 - 2² = 21132323207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21132323011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81908101 + ... + 81908358.

It is an arithmetic number, because the mean of its divisors is an integer number (3603962120).

Almost surely, 2^21132323211 is an apocalyptic number.

21132323211 is a deficient number, since it is larger than the sum of its proper divisors (7699373749).

21132323211 is a wasteful number, since it uses less digits than its factorization.

21132323211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163816505.

The product of its digits is 432, while the sum is 21.

Adding to 21132323211 its reverse (11232323112), we get a palindrome (32364646323).

Subtracting from 21132323211 its reverse (11232323112), we obtain a palindrome (9900000099).

The spelling of 21132323211 in words is "twenty-one billion, one hundred thirty-two million, three hundred twenty-three thousand, two hundred eleven".