1020212220217 has 2 divisors, whose sum is σ = 1020212220218. Its totient is φ = 1020212220216.

The previous prime is 1020212220211. The next prime is 1020212220227. The reversal of 1020212220217 is 7120222120201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 957930030121 + 62282190096 = 978739^2 + 249564^2 .

It is an emirp because it is prime and its reverse (7120222120201) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020212220217 is a prime.

It is not a weakly prime, because it can be changed into another prime (1020212220211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510106110108 + 510106110109.

It is an arithmetic number, because the mean of its divisors is an integer number (510106110109).

Almost surely, 2^{1020212220217} is an apocalyptic number.

It is an amenable number.

1020212220217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020212220217 is an equidigital number, since it uses as much as digits as its factorization.

1020212220217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 22.

Adding to 1020212220217 its reverse (7120222120201), we get a palindrome (8140434340418).

The spelling of 1020212220217 in words is "one trillion, twenty billion, two hundred twelve million, two hundred twenty thousand, two hundred seventeen".