1210022220221 has 2 divisors, whose sum is σ = 1210022220222. Its totient is φ = 1210022220220.

The previous prime is 1210022220167. The next prime is 1210022220311. The reversal of 1210022220221 is 1220222200121.

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., 920055048025 + 289967172196 = 959195^2 + 538486^2 .

It is a cyclic number.

It is not a de Polignac number, because 1210022220221 - 2¹⁴ = 1210022203837 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1210022220221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1210022220521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605011110110 + 605011110111.

It is an arithmetic number, because the mean of its divisors is an integer number (605011110111).

Almost surely, 2^{1210022220221} is an apocalyptic number.

It is an amenable number.

1210022220221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210022220221 is an equidigital number, since it uses as much as digits as its factorization.

1210022220221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 1210022220221 its reverse (1220222200121), we get a palindrome (2430244420342).

The spelling of 1210022220221 in words is "one trillion, two hundred ten billion, twenty-two million, two hundred twenty thousand, two hundred twenty-one".