20021201220211 has 2 divisors, whose sum is σ = 20021201220212. Its totient is φ = 20021201220210.

The previous prime is 20021201220131. The next prime is 20021201220239. The reversal of 20021201220211 is 11202210212002.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20021201220211 - 2¹¹ = 20021201218163 is a prime.

It is not a weakly prime, because it can be changed into another prime (20021201223211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010600610105 + 10010600610106.

It is an arithmetic number, because the mean of its divisors is an integer number (10010600610106).

Almost surely, 2^{20021201220211} is an apocalyptic number.

20021201220211 is a deficient number, since it is larger than the sum of its proper divisors (1).

20021201220211 is an equidigital number, since it uses as much as digits as its factorization.

20021201220211 is an odious number, because the sum of its binary digits is odd.

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

Adding to 20021201220211 its reverse (11202210212002), we get a palindrome (31223411432213).

The spelling of 20021201220211 in words is "twenty trillion, twenty-one billion, two hundred one million, two hundred twenty thousand, two hundred eleven".