20001222211 has 8 divisors (see below), whose sum is σ = 22098537504. Its totient is φ = 18006215040.

The previous prime is 20001222161. The next prime is 20001222217. The reversal of 20001222211 is 11222210002.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20001222211 - 2¹³ = 20001214019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20001222191 and 20001222200.

It is not an unprimeable number, because it can be changed into a prime (20001222217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25576620 + ... + 25577401.

It is an arithmetic number, because the mean of its divisors is an integer number (2762317188).

Almost surely, 2^20001222211 is an apocalyptic number.

20001222211 is a deficient number, since it is larger than the sum of its proper divisors (2097315293).

20001222211 is a wasteful number, since it uses less digits than its factorization.

20001222211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51154061.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20001222211 its reverse (11222210002), we get a palindrome (31223432213).

The spelling of 20001222211 in words is "twenty billion, one million, two hundred twenty-two thousand, two hundred eleven".