21222505633 has 8 divisors (see below), whose sum is σ = 24255173952. Its totient is φ = 18190057776.

The previous prime is 21222505597. The next prime is 21222505673. The reversal of 21222505633 is 33650522212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21222505633 - 2⁹ = 21222505121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21222505595 and 21222505604.

It is not an unprimeable number, because it can be changed into a prime (21222505673) 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 7 ways as a sum of consecutive naturals, for example, 340566 + ... + 398032.

It is an arithmetic number, because the mean of its divisors is an integer number (3031896744).

Almost surely, 2^21222505633 is an apocalyptic number.

It is an amenable number.

21222505633 is a deficient number, since it is larger than the sum of its proper divisors (3032668319).

21222505633 is an equidigital number, since it uses as much as digits as its factorization.

21222505633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110231.

The product of its (nonzero) digits is 21600, while the sum is 31.

The spelling of 21222505633 in words is "twenty-one billion, two hundred twenty-two million, five hundred five thousand, six hundred thirty-three".