122021222221 has 2 divisors, whose sum is σ = 122021222222. Its totient is φ = 122021222220.

The previous prime is 122021222189. The next prime is 122021222299. The reversal of 122021222221 is 122222120221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76278706596 + 45742515625 = 276186^2 + 213875^2 .

It is a cyclic number.

It is not a de Polignac number, because 122021222221 - 2⁵ = 122021222189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122021220221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61010611110 + 61010611111.

It is an arithmetic number, because the mean of its divisors is an integer number (61010611111).

Almost surely, 2^122021222221 is an apocalyptic number.

It is an amenable number.

122021222221 is a deficient number, since it is larger than the sum of its proper divisors (1).

122021222221 is an equidigital number, since it uses as much as digits as its factorization.

122021222221 is an evil number, because the sum of its binary digits is even.

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

Adding to 122021222221 its reverse (122222120221), we get a palindrome (244243342442).

The spelling of 122021222221 in words is "one hundred twenty-two billion, twenty-one million, two hundred twenty-two thousand, two hundred twenty-one".