21222052413617 has 16 divisors (see below), whose sum is σ = 23208944429760. Its totient is φ = 19244766931200.

The previous prime is 21222052413607. The next prime is 21222052413629. The reversal of 21222052413617 is 71631425022212.

It is a cyclic number.

It is not a de Polignac number, because 21222052413617 - 2³⁰ = 21220978671793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21222052413607) 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 15 ways as a sum of consecutive naturals, for example, 118553693 + ... + 118732565.

It is an arithmetic number, because the mean of its divisors is an integer number (1450559026860).

Almost surely, 2^{21222052413617} is an apocalyptic number.

It is an amenable number.

21222052413617 is a deficient number, since it is larger than the sum of its proper divisors (1986892016143).

21222052413617 is a wasteful number, since it uses less digits than its factorization.

21222052413617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205664.

The product of its (nonzero) digits is 80640, while the sum is 38.

Adding to 21222052413617 its reverse (71631425022212), we get a palindrome (92853477435829).

The spelling of 21222052413617 in words is "twenty-one trillion, two hundred twenty-two billion, fifty-two million, four hundred thirteen thousand, six hundred seventeen".