21201222211069 has 2 divisors, whose sum is σ = 21201222211070. Its totient is φ = 21201222211068.

The previous prime is 21201222211063. The next prime is 21201222211079. The reversal of 21201222211069 is 96011222210212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15830555010169 + 5370667200900 = 3978763^2 + 2317470^2 .

It is a cyclic number.

It is not a de Polignac number, because 21201222211069 - 2¹¹ = 21201222209021 is a prime.

It is a super-2 number, since 2×21201222211069² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21201222211069.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21201222211063) 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, 10600611105534 + 10600611105535.

It is an arithmetic number, because the mean of its divisors is an integer number (10600611105535).

Almost surely, 2^{21201222211069} is an apocalyptic number.

It is an amenable number.

21201222211069 is a deficient number, since it is larger than the sum of its proper divisors (1).

21201222211069 is an equidigital number, since it uses as much as digits as its factorization.

21201222211069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 31.

The spelling of 21201222211069 in words is "twenty-one trillion, two hundred one billion, two hundred twenty-two million, two hundred eleven thousand, sixty-nine".