22021011200221 has 18 divisors (see below), whose sum is σ = 25712485622810. Its totient is φ = 18841506879360.

The previous prime is 22021011200219. The next prime is 22021011200311. The reversal of 22021011200221 is 12200211012022.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 15689441780100 + 6331569420121 = 3960990^2 + 2516261^2 .

It is not a de Polignac number, because 22021011200221 - 2¹ = 22021011200219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22021011200195 and 22021011200204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22021011200921) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 314829786 + ... + 314899723.

Almost surely, 2^{22021011200221} is an apocalyptic number.

It is an amenable number.

22021011200221 is a deficient number, since it is larger than the sum of its proper divisors (3691474422589).

22021011200221 is a wasteful number, since it uses less digits than its factorization.

22021011200221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629729565 (or 629729537 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22021011200221 its reverse (12200211012022), we get a palindrome (34221222212243).

The spelling of 22021011200221 in words is "twenty-two trillion, twenty-one billion, eleven million, two hundred thousand, two hundred twenty-one".