21133333233333 has 16 divisors (see below), whose sum is σ = 31660424323200. Its totient is φ = 13930586699040.

The previous prime is 21133333233283. The next prime is 21133333233401. The reversal of 21133333233333 is 33333233333112.

It is a happy number.

21133333233333 is a `hidden beast` number, since 21 + 13 + 33 + 33 + 233 + 333 = 666.

It is not a de Polignac number, because 21133333233333 - 2¹⁰ = 21133333232309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21133333233433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4397278753 + ... + 4397283558.

It is an arithmetic number, because the mean of its divisors is an integer number (1978776520200).

Almost surely, 2^{21133333233333} is an apocalyptic number.

It is an amenable number.

21133333233333 is a deficient number, since it is larger than the sum of its proper divisors (10527091089867).

21133333233333 is an equidigital number, since it uses as much as digits as its factorization.

21133333233333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8794562409 (or 8794562403 counting only the distinct ones).

The product of its digits is 236196, while the sum is 36.

Adding to 21133333233333 its reverse (33333233333112), we get a palindrome (54466566566445).

The spelling of 21133333233333 in words is "twenty-one trillion, one hundred thirty-three billion, three hundred thirty-three million, two hundred thirty-three thousand, three hundred thirty-three".