1210220010221 has 2 divisors, whose sum is σ = 1210220010222. Its totient is φ = 1210220010220.

The previous prime is 1210220010191. The next prime is 1210220010229. The reversal of 1210220010221 is 1220100220121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 985425494596 + 224794515625 = 992686^2 + 474125^2 .

It is a cyclic number.

It is not a de Polignac number, because 1210220010221 - 2¹⁸ = 1210219748077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1210220010196 and 1210220010205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1210220010229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605110005110 + 605110005111.

It is an arithmetic number, because the mean of its divisors is an integer number (605110005111).

Almost surely, 2^{1210220010221} is an apocalyptic number.

It is an amenable number.

1210220010221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210220010221 is an equidigital number, since it uses as much as digits as its factorization.

1210220010221 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 14.

Adding to 1210220010221 its reverse (1220100220121), we get a palindrome (2430320230342).

The spelling of 1210220010221 in words is "one trillion, two hundred ten billion, two hundred twenty million, ten thousand, two hundred twenty-one".