1220020010221 has 2 divisors, whose sum is σ = 1220020010222. Its totient is φ = 1220020010220.

The previous prime is 1220020010197. The next prime is 1220020010299. The reversal of 1220020010221 is 1220100200221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1159683456996 + 60336553225 = 1076886^2 + 245635^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220020010221 - 2⁵ = 1220020010189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220020016221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610010005110 + 610010005111.

It is an arithmetic number, because the mean of its divisors is an integer number (610010005111).

Almost surely, 2^{1220020010221} is an apocalyptic number.

It is an amenable number.

1220020010221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220020010221 is an equidigital number, since it uses as much as digits as its factorization.

1220020010221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1220020010221 its reverse (1220100200221), we get a palindrome (2440120210442).

The spelling of 1220020010221 in words is "one trillion, two hundred twenty billion, twenty million, ten thousand, two hundred twenty-one".