1002012110221 has 2 divisors, whose sum is σ = 1002012110222. Its totient is φ = 1002012110220.

The previous prime is 1002012110179. The next prime is 1002012110279. The reversal of 1002012110221 is 1220112102001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 931728798121 + 70283312100 = 965261^2 + 265110^2 .

It is a cyclic number.

It is not a de Polignac number, because 1002012110221 - 2¹⁹ = 1002011585933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1002012110821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501006055110 + 501006055111.

It is an arithmetic number, because the mean of its divisors is an integer number (501006055111).

Almost surely, 2^{1002012110221} is an apocalyptic number.

It is an amenable number.

1002012110221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002012110221 is an equidigital number, since it uses as much as digits as its factorization.

1002012110221 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.

Adding to 1002012110221 its reverse (1220112102001), we get a palindrome (2222124212222).

The spelling of 1002012110221 in words is "one trillion, two billion, twelve million, one hundred ten thousand, two hundred twenty-one".