21222052413616 has 20 divisors (see below), whose sum is σ = 41281542202824. Its totient is φ = 10568751200000.

The previous prime is 21222052413607. The next prime is 21222052413629. The reversal of 21222052413616 is 61631425022212.

It is a super-2 number, since 2×21222052413616² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2642183785 + ... + 2642191816.

Almost surely, 2^{21222052413616} is an apocalyptic number.

It is an amenable number.

21222052413616 is a deficient number, since it is larger than the sum of its proper divisors (20059489789208).

21222052413616 is a wasteful number, since it uses less digits than its factorization.

21222052413616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5284375860 (or 5284375854 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 37.

Adding to 21222052413616 its reverse (61631425022212), we get a palindrome (82853477435828).

The spelling of 21222052413616 in words is "twenty-one trillion, two hundred twenty-two billion, fifty-two million, four hundred thirteen thousand, six hundred sixteen".