202122443909 has 2 divisors, whose sum is σ = 202122443910. Its totient is φ = 202122443908.

The previous prime is 202122443879. The next prime is 202122443911. The reversal of 202122443909 is 909344221202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198244891009 + 3877552900 = 445247^2 + 62270^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202122443909 is a prime.

Together with 202122443911, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202122443969) 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, 101061221954 + 101061221955.

It is an arithmetic number, because the mean of its divisors is an integer number (101061221955).

Almost surely, 2^202122443909 is an apocalyptic number.

It is an amenable number.

202122443909 is a deficient number, since it is larger than the sum of its proper divisors (1).

202122443909 is an equidigital number, since it uses as much as digits as its factorization.

202122443909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 38.

The spelling of 202122443909 in words is "two hundred two billion, one hundred twenty-two million, four hundred forty-three thousand, nine hundred nine".