122218337261 has 2 divisors, whose sum is σ = 122218337262. Its totient is φ = 122218337260.

The previous prime is 122218337251. The next prime is 122218337281. The reversal of 122218337261 is 162733812221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82014077161 + 40204260100 = 286381^2 + 200510^2 .

It is an emirp because it is prime and its reverse (162733812221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 122218337261 - 2¹⁴ = 122218320877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122218337251) 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, 61109168630 + 61109168631.

It is an arithmetic number, because the mean of its divisors is an integer number (61109168631).

Almost surely, 2^122218337261 is an apocalyptic number.

It is an amenable number.

122218337261 is a deficient number, since it is larger than the sum of its proper divisors (1).

122218337261 is an equidigital number, since it uses as much as digits as its factorization.

122218337261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 38.

The spelling of 122218337261 in words is "one hundred twenty-two billion, two hundred eighteen million, three hundred thirty-seven thousand, two hundred sixty-one".