122210220221021 has 2 divisors, whose sum is σ = 122210220221022. Its totient is φ = 122210220221020.

The previous prime is 122210220220997. The next prime is 122210220221053. The reversal of 122210220221021 is 120122022012221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64691859765625 + 57518360455396 = 8043125^2 + 7584086^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122210220221021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 122210220220984 and 122210220221002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122210220221321) 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, 61105110110510 + 61105110110511.

It is an arithmetic number, because the mean of its divisors is an integer number (61105110110511).

Almost surely, 2^{122210220221021} is an apocalyptic number.

It is an amenable number.

122210220221021 is a deficient number, since it is larger than the sum of its proper divisors (1).

122210220221021 is an equidigital number, since it uses as much as digits as its factorization.

122210220221021 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 20.

Adding to 122210220221021 its reverse (120122022012221), we get a palindrome (242332242233242).

The spelling of 122210220221021 in words is "one hundred twenty-two trillion, two hundred ten billion, two hundred twenty million, two hundred twenty-one thousand, twenty-one".