21202134233 has 24 divisors (see below), whose sum is σ = 26057116800. Its totient is φ = 17173207968.

The previous prime is 21202134211. The next prime is 21202134241. The reversal of 21202134233 is 33243120212.

It is not a de Polignac number, because 21202134233 - 2⁶ = 21202134169 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21202134199 and 21202134208.

It is not an unprimeable number, because it can be changed into a prime (21202134133) 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 23 ways as a sum of consecutive naturals, for example, 91943 + ... + 225516.

It is an arithmetic number, because the mean of its divisors is an integer number (1085713200).

Almost surely, 2^21202134233 is an apocalyptic number.

It is an amenable number.

21202134233 is a deficient number, since it is larger than the sum of its proper divisors (4854982567).

21202134233 is a wasteful number, since it uses less digits than its factorization.

21202134233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317549 (or 317542 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21202134233 its reverse (33243120212), we get a palindrome (54445254445).

The spelling of 21202134233 in words is "twenty-one billion, two hundred two million, one hundred thirty-four thousand, two hundred thirty-three".