20002221022211 has 4 divisors (see below), whose sum is σ = 20002660126992. Its totient is φ = 20001781917432.

The previous prime is 20002221022187. The next prime is 20002221022213. The reversal of 20002221022211 is 11222012220002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20002221022211 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20002221022211.

It is not an unprimeable number, because it can be changed into a prime (20002221022213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219484055 + ... + 219575168.

It is an arithmetic number, because the mean of its divisors is an integer number (5000665031748).

Almost surely, 2^{20002221022211} is an apocalyptic number.

20002221022211 is a deficient number, since it is larger than the sum of its proper divisors (439104781).

20002221022211 is an equidigital number, since it uses as much as digits as its factorization.

20002221022211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439104780.

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

Adding to 20002221022211 its reverse (11222012220002), we get a palindrome (31224233242213).

The spelling of 20002221022211 in words is "twenty trillion, two billion, two hundred twenty-one million, twenty-two thousand, two hundred eleven".