1210220100217 has 2 divisors, whose sum is σ = 1210220100218. Its totient is φ = 1210220100216.

The previous prime is 1210220100211. The next prime is 1210220100223. The reversal of 1210220100217 is 7120010220121.

It is a balanced prime because it is at equal distance from previous prime (1210220100211) and next prime (1210220100223).

It can be written as a sum of positive squares in only one way, i.e., 1192418136441 + 17801963776 = 1091979^2 + 133424^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1210220100217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1210220100194 and 1210220100203.

It is not a weakly prime, because it can be changed into another prime (1210220100211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605110050108 + 605110050109.

It is an arithmetic number, because the mean of its divisors is an integer number (605110050109).

Almost surely, 2^{1210220100217} is an apocalyptic number.

It is an amenable number.

1210220100217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210220100217 is an equidigital number, since it uses as much as digits as its factorization.

1210220100217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 19.

Adding to 1210220100217 its reverse (7120010220121), we get a palindrome (8330230320338).

The spelling of 1210220100217 in words is "one trillion, two hundred ten billion, two hundred twenty million, one hundred thousand, two hundred seventeen".