21233252133 has 6 divisors (see below), whose sum is σ = 30670253094. Its totient is φ = 14155501416.

The previous prime is 21233252113. The next prime is 21233252141. The reversal of 21233252133 is 33125233212.

It is a happy number.

21233252133 is a `hidden beast` number, since 2 + 123 + 325 + 213 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19774546884 + 1458705249 = 140622^2 + 38193^2 .

It is not a de Polignac number, because 21233252133 - 2⁸ = 21233251877 is a prime.

It is a super-2 number, since 2×21233252133² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21233252097 and 21233252106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21233252113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1179625110 + ... + 1179625127.

It is an arithmetic number, because the mean of its divisors is an integer number (5111708849).

Almost surely, 2^21233252133 is an apocalyptic number.

It is an amenable number.

21233252133 is a deficient number, since it is larger than the sum of its proper divisors (9437000961).

21233252133 is a wasteful number, since it uses less digits than its factorization.

21233252133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2359250243 (or 2359250240 counting only the distinct ones).

The product of its digits is 6480, while the sum is 27.

Adding to 21233252133 its reverse (33125233212), we get a palindrome (54358485345).

The spelling of 21233252133 in words is "twenty-one billion, two hundred thirty-three million, two hundred fifty-two thousand, one hundred thirty-three".