21234311133 has 16 divisors (see below), whose sum is σ = 32416872576. Its totient is φ = 12111456960.

The previous prime is 21234311129. The next prime is 21234311177. The reversal of 21234311133 is 33111343212.

It is not a de Polignac number, because 21234311133 - 2² = 21234311129 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21234311113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 923166 + ... + 945887.

It is an arithmetic number, because the mean of its divisors is an integer number (2026054536).

Almost surely, 2^21234311133 is an apocalyptic number.

It is an amenable number.

21234311133 is a deficient number, since it is larger than the sum of its proper divisors (11182561443).

21234311133 is a wasteful number, since it uses less digits than its factorization.

21234311133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1869604.

The product of its digits is 1296, while the sum is 24.

Adding to 21234311133 its reverse (33111343212), we get a palindrome (54345654345).

The spelling of 21234311133 in words is "twenty-one billion, two hundred thirty-four million, three hundred eleven thousand, one hundred thirty-three".