21133222305 has 16 divisors (see below), whose sum is σ = 36414168000. Its totient is φ = 10404047808.

The previous prime is 21133222249. The next prime is 21133222337. The reversal of 21133222305 is 50322233112.

It is a happy number.

It is not a de Polignac number, because 21133222305 - 2⁶ = 21133222241 is a prime.

It is a super-2 number, since 2×21133222305² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 54187555 + ... + 54187944.

It is an arithmetic number, because the mean of its divisors is an integer number (2275885500).

Almost surely, 2^21133222305 is an apocalyptic number.

It is an amenable number.

21133222305 is a deficient number, since it is larger than the sum of its proper divisors (15280945695).

21133222305 is a wasteful number, since it uses less digits than its factorization.

21133222305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108375520.

The product of its (nonzero) digits is 2160, while the sum is 24.

Adding to 21133222305 its reverse (50322233112), we get a palindrome (71455455417).

The spelling of 21133222305 in words is "twenty-one billion, one hundred thirty-three million, two hundred twenty-two thousand, three hundred five".