20001222210211 has 4 divisors (see below), whose sum is σ = 21819515138424. Its totient is φ = 18182929282000.

The previous prime is 20001222210199. The next prime is 20001222210223. The reversal of 20001222210211 is 11201222210002.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (20001222210199) and next prime (20001222210223).

It is a cyclic number.

It is not a de Polignac number, because 20001222210211 - 2³³ = 19992632275619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20001222210271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 909146464090 + ... + 909146464111.

It is an arithmetic number, because the mean of its divisors is an integer number (5454878784606).

Almost surely, 2^{20001222210211} is an apocalyptic number.

20001222210211 is a deficient number, since it is larger than the sum of its proper divisors (1818292928213).

20001222210211 is a wasteful number, since it uses less digits than its factorization.

20001222210211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1818292928212.

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

Adding to 20001222210211 its reverse (11201222210002), we get a palindrome (31202444420213).

The spelling of 20001222210211 in words is "twenty trillion, one billion, two hundred twenty-two million, two hundred ten thousand, two hundred eleven".