21134433211 has 8 divisors (see below), whose sum is σ = 21886768800. Its totient is φ = 20383668480.

The previous prime is 21134433163. The next prime is 21134433311. The reversal of 21134433211 is 11233443112.

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

It is not a de Polignac number, because 21134433211 - 2⁹ = 21134432699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21134433311) 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, 365295 + ... + 419176.

It is an arithmetic number, because the mean of its divisors is an integer number (2735846100).

Almost surely, 2^21134433211 is an apocalyptic number.

21134433211 is a deficient number, since it is larger than the sum of its proper divisors (752335589).

21134433211 is an equidigital number, since it uses as much as digits as its factorization.

21134433211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785429.

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

Adding to 21134433211 its reverse (11233443112), we get a palindrome (32367876323).

Subtracting from 21134433211 its reverse (11233443112), we obtain a palindrome (9900990099).

The spelling of 21134433211 in words is "twenty-one billion, one hundred thirty-four million, four hundred thirty-three thousand, two hundred eleven".