1220322230221 has 2 divisors, whose sum is σ = 1220322230222. Its totient is φ = 1220322230220.

The previous prime is 1220322230213. The next prime is 1220322230249.

1220322230221 is nontrivially palindromic in base 10.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1165998274596 + 54323955625 = 1079814^2 + 233075^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 1220322230221 - 2³ = 1220322230213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1220322230192 and 1220322230201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220322230321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610161115110 + 610161115111.

It is an arithmetic number, because the mean of its divisors is an integer number (610161115111).

Almost surely, 2^{1220322230221} is an apocalyptic number.

It is an amenable number.

1220322230221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220322230221 is an equidigital number, since it uses as much as digits as its factorization.

1220322230221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 22.

The spelling of 1220322230221 in words is "one trillion, two hundred twenty billion, three hundred twenty-two million, two hundred thirty thousand, two hundred twenty-one".