20001222022211 has 2 divisors, whose sum is σ = 20001222022212. Its totient is φ = 20001222022210.

The previous prime is 20001222022151. The next prime is 20001222022303. The reversal of 20001222022211 is 11222022210002.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20001222022211 - 2⁴² = 15603175511107 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20001222022211.

It is not a weakly prime, because it can be changed into another prime (20001222022711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000611011105 + 10000611011106.

It is an arithmetic number, because the mean of its divisors is an integer number (10000611011106).

Almost surely, 2^{20001222022211} is an apocalyptic number.

20001222022211 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001222022211 is an equidigital number, since it uses as much as digits as its factorization.

20001222022211 is an evil number, because the sum of its binary digits is even.

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

Adding to 20001222022211 its reverse (11222022210002), we get a palindrome (31223244232213).

The spelling of 20001222022211 in words is "twenty trillion, one billion, two hundred twenty-two million, twenty-two thousand, two hundred eleven".