1210211001217 has 2 divisors, whose sum is σ = 1210211001218. Its totient is φ = 1210211001216.

The previous prime is 1210211001211. The next prime is 1210211001239. The reversal of 1210211001217 is 7121001120121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1018436198976 + 191774802241 = 1009176^2 + 437921^2 .

It is a cyclic number.

It is not a de Polignac number, because 1210211001217 - 2¹¹ = 1210210999169 is a prime.

It is a super-2 number, since 2×1210211001217² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1210211001194 and 1210211001203.

It is not a weakly prime, because it can be changed into another prime (1210211001211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605105500608 + 605105500609.

It is an arithmetic number, because the mean of its divisors is an integer number (605105500609).

Almost surely, 2^{1210211001217} is an apocalyptic number.

It is an amenable number.

1210211001217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210211001217 is an equidigital number, since it uses as much as digits as its factorization.

1210211001217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56, while the sum is 19.

Adding to 1210211001217 its reverse (7121001120121), we get a palindrome (8331212121338).

The spelling of 1210211001217 in words is "one trillion, two hundred ten billion, two hundred eleven million, one thousand, two hundred seventeen".