21222016420635 has 192 divisors, whose sum is σ = 39639514337280. Its totient is φ = 10471131740160.

The previous prime is 21222016420621. The next prime is 21222016420663. The reversal of 21222016420635 is 53602461022212.

21222016420635 is a `hidden beast` number, since 2 + 1 + 2 + 2 + 2 + 0 + 1 + 642 + 0 + 6 + 3 + 5 = 666.

It is not a de Polignac number, because 21222016420635 - 2⁵ = 21222016420603 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21222016420635.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 4293344974 + ... + 4293349916.

It is an arithmetic number, because the mean of its divisors is an integer number (206455803840).

Almost surely, 2^{21222016420635} is an apocalyptic number.

21222016420635 is a deficient number, since it is larger than the sum of its proper divisors (18417497916645).

21222016420635 is a wasteful number, since it uses less digits than its factorization.

21222016420635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5610 (or 5607 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

Adding to 21222016420635 its reverse (53602461022212), we get a palindrome (74824477442847).

The spelling of 21222016420635 in words is "twenty-one trillion, two hundred twenty-two billion, sixteen million, four hundred twenty thousand, six hundred thirty-five".