21233122133 has 4 divisors (see below), whose sum is σ = 21292267680. Its totient is φ = 21173976588.

The previous prime is 21233122123. The next prime is 21233122171. The reversal of 21233122133 is 33122133212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21233122133 - 2²⁶ = 21166013269 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21233122099 and 21233122108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21233122103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29572235 + ... + 29572952.

It is an arithmetic number, because the mean of its divisors is an integer number (5323066920).

Almost surely, 2^21233122133 is an apocalyptic number.

It is an amenable number.

21233122133 is a deficient number, since it is larger than the sum of its proper divisors (59145547).

21233122133 is an equidigital number, since it uses as much as digits as its factorization.

21233122133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59145546.

The product of its digits is 1296, while the sum is 23.

Adding to 21233122133 its reverse (33122133212), we get a palindrome (54355255345).

The spelling of 21233122133 in words is "twenty-one billion, two hundred thirty-three million, one hundred twenty-two thousand, one hundred thirty-three".