122221193209 has 2 divisors, whose sum is σ = 122221193210. Its totient is φ = 122221193208.

The previous prime is 122221193207. The next prime is 122221193231. The reversal of 122221193209 is 902391122221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98373186025 + 23848007184 = 313645^2 + 154428^2 .

It is a cyclic number.

It is not a de Polignac number, because 122221193209 - 2¹ = 122221193207 is a prime.

Together with 122221193207, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (122221193207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61110596604 + 61110596605.

It is an arithmetic number, because the mean of its divisors is an integer number (61110596605).

Almost surely, 2^122221193209 is an apocalyptic number.

It is an amenable number.

122221193209 is a deficient number, since it is larger than the sum of its proper divisors (1).

122221193209 is an equidigital number, since it uses as much as digits as its factorization.

122221193209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 34.

The spelling of 122221193209 in words is "one hundred twenty-two billion, two hundred twenty-one million, one hundred ninety-three thousand, two hundred nine".