21233121133 has 8 divisors (see below), whose sum is σ = 24664234880. Its totient is φ = 17901460080.

The previous prime is 21233121103. The next prime is 21233121157. The reversal of 21233121133 is 33112133212.

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

It is not a de Polignac number, because 21233121133 - 2³³ = 12643186541 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 (21233121103) 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, 24862713 + ... + 24863566.

It is an arithmetic number, because the mean of its divisors is an integer number (3083029360).

Almost surely, 2^21233121133 is an apocalyptic number.

It is an amenable number.

21233121133 is a deficient number, since it is larger than the sum of its proper divisors (3431113747).

21233121133 is an equidigital number, since it uses as much as digits as its factorization.

21233121133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49726347.

The product of its digits is 648, while the sum is 22.

Adding to 21233121133 its reverse (33112133212), we get a palindrome (54345254345).

The spelling of 21233121133 in words is "twenty-one billion, two hundred thirty-three million, one hundred twenty-one thousand, one hundred thirty-three".