122102202220021 has 2 divisors, whose sum is σ = 122102202220022. Its totient is φ = 122102202220020.

The previous prime is 122102202219997. The next prime is 122102202220051. The reversal of 122102202220021 is 120022202201221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61187907952900 + 60914294267121 = 7822270^2 + 7804761^2 .

It is a cyclic number.

It is not a de Polignac number, because 122102202220021 - 2¹⁷ = 122102202088949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122102202220051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61051101110010 + 61051101110011.

It is an arithmetic number, because the mean of its divisors is an integer number (61051101110011).

Almost surely, 2^{122102202220021} is an apocalyptic number.

It is an amenable number.

122102202220021 is a deficient number, since it is larger than the sum of its proper divisors (1).

122102202220021 is an equidigital number, since it uses as much as digits as its factorization.

122102202220021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 122102202220021 its reverse (120022202201221), we get a palindrome (242124404421242).

The spelling of 122102202220021 in words is "one hundred twenty-two trillion, one hundred two billion, two hundred two million, two hundred twenty thousand, twenty-one".