122220122261 has 2 divisors, whose sum is σ = 122220122262. Its totient is φ = 122220122260.

The previous prime is 122220122203. The next prime is 122220122267. The reversal of 122220122261 is 162221022221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118263083236 + 3957039025 = 343894^2 + 62905^2 .

It is a cyclic number.

It is not a de Polignac number, because 122220122261 - 2¹⁸ = 122219860117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122220122267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61110061130 + 61110061131.

It is an arithmetic number, because the mean of its divisors is an integer number (61110061131).

Almost surely, 2^122220122261 is an apocalyptic number.

It is an amenable number.

122220122261 is a deficient number, since it is larger than the sum of its proper divisors (1).

122220122261 is an equidigital number, since it uses as much as digits as its factorization.

122220122261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 122220122261 its reverse (162221022221), we get a palindrome (284441144482).

The spelling of 122220122261 in words is "one hundred twenty-two billion, two hundred twenty million, one hundred twenty-two thousand, two hundred sixty-one".