122011222261 has 2 divisors, whose sum is σ = 122011222262. Its totient is φ = 122011222260.

The previous prime is 122011222243. The next prime is 122011222271. The reversal of 122011222261 is 162222110221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103134111025 + 18877111236 = 321145^2 + 137394^2 .

It is a cyclic number.

It is not a de Polignac number, because 122011222261 - 2¹⁵ = 122011189493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122011222271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61005611130 + 61005611131.

It is an arithmetic number, because the mean of its divisors is an integer number (61005611131).

Almost surely, 2^122011222261 is an apocalyptic number.

It is an amenable number.

122011222261 is a deficient number, since it is larger than the sum of its proper divisors (1).

122011222261 is an equidigital number, since it uses as much as digits as its factorization.

122011222261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 122011222261 its reverse (162222110221), we get a palindrome (284233332482).

The spelling of 122011222261 in words is "one hundred twenty-two billion, eleven million, two hundred twenty-two thousand, two hundred sixty-one".