21232112133 has 32 divisors (see below), whose sum is σ = 29580328960. Its totient is φ = 13531173120.

The previous prime is 21232112129. The next prime is 21232112173. The reversal of 21232112133 is 33121123212.

It is not a de Polignac number, because 21232112133 - 2² = 21232112129 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21232112173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4145148 + ... + 4150266.

It is an arithmetic number, because the mean of its divisors is an integer number (924385280).

Almost surely, 2^21232112133 is an apocalyptic number.

It is an amenable number.

21232112133 is a deficient number, since it is larger than the sum of its proper divisors (8348216827).

21232112133 is a wasteful number, since it uses less digits than its factorization.

21232112133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5689.

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

Adding to 21232112133 its reverse (33121123212), we get a palindrome (54353235345).

The spelling of 21232112133 in words is "twenty-one billion, two hundred thirty-two million, one hundred twelve thousand, one hundred thirty-three".