21233242233 has 80 divisors (see below), whose sum is σ = 39275786880. Its totient is φ = 11153769984.

The previous prime is 21233242231. The next prime is 21233242241. The reversal of 21233242233 is 33224233212.

21233242233 is a `hidden beast` number, since 2 + 1 + 233 + 2 + 422 + 3 + 3 = 666.

It is not a de Polignac number, because 21233242233 - 2¹ = 21233242231 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 21233242197 and 21233242206.

It is not an unprimeable number, because it can be changed into a prime (21233242231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 388863 + ... + 440091.

It is an arithmetic number, because the mean of its divisors is an integer number (490947336).

Almost surely, 2^21233242233 is an apocalyptic number.

It is an amenable number.

21233242233 is a deficient number, since it is larger than the sum of its proper divisors (18042544647).

21233242233 is a wasteful number, since it uses less digits than its factorization.

21233242233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51308 (or 51299 counting only the distinct ones).

The product of its digits is 10368, while the sum is 27.

Adding to 21233242233 its reverse (33224233212), we get a palindrome (54457475445).

The spelling of 21233242233 in words is "twenty-one billion, two hundred thirty-three million, two hundred forty-two thousand, two hundred thirty-three".