20002211022221 has 8 divisors (see below), whose sum is σ = 20105510390784. Its totient is φ = 19899060824800.

The previous prime is 20002211022197. The next prime is 20002211022223. The reversal of 20002211022221 is 12222011220002.

It is a happy number.

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 20002211022221 - 2³⁴ = 19985031153037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20002211022221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002211022223) 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, 37023911 + ... + 37560276.

It is an arithmetic number, because the mean of its divisors is an integer number (2513188798848).

Almost surely, 2^{20002211022221} is an apocalyptic number.

It is an amenable number.

20002211022221 is a deficient number, since it is larger than the sum of its proper divisors (103299368563).

20002211022221 is a wasteful number, since it uses less digits than its factorization.

20002211022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74585571.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20002211022221 its reverse (12222011220002), we get a palindrome (32224222242223).

The spelling of 20002211022221 in words is "twenty trillion, two billion, two hundred eleven million, twenty-two thousand, two hundred twenty-one".