21222021201071 has 2 divisors, whose sum is σ = 21222021201072. Its totient is φ = 21222021201070.

The previous prime is 21222021201023. The next prime is 21222021201079. The reversal of 21222021201071 is 17010212022212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21222021201071 - 2¹⁸ = 21222020938927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21222021201079) 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 as a sum of consecutive naturals, namely, 10611010600535 + 10611010600536.

It is an arithmetic number, because the mean of its divisors is an integer number (10611010600536).

Almost surely, 2^{21222021201071} is an apocalyptic number.

21222021201071 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222021201071 is an equidigital number, since it uses as much as digits as its factorization.

21222021201071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 23.

Adding to 21222021201071 its reverse (17010212022212), we get a palindrome (38232233223283).

The spelling of 21222021201071 in words is "twenty-one trillion, two hundred twenty-two billion, twenty-one million, two hundred one thousand, seventy-one".