1220101010221 has 2 divisors, whose sum is σ = 1220101010222. Its totient is φ = 1220101010220.

The previous prime is 1220101010189. The next prime is 1220101010231.

1220101010221 is nontrivially palindromic in base 10.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1133362514025 + 86738496196 = 1064595^2 + 294514^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 1220101010221 - 2⁵ = 1220101010189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220101010231) 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, 610050505110 + 610050505111.

It is an arithmetic number, because the mean of its divisors is an integer number (610050505111).

Almost surely, 2^{1220101010221} is an apocalyptic number.

It is an amenable number.

1220101010221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220101010221 is an equidigital number, since it uses as much as digits as its factorization.

1220101010221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

The spelling of 1220101010221 in words is "one trillion, two hundred twenty billion, one hundred one million, ten thousand, two hundred twenty-one".