1210011121217 has 2 divisors, whose sum is σ = 1210011121218. Its totient is φ = 1210011121216.

The previous prime is 1210011121201. The next prime is 1210011121219. The reversal of 1210011121217 is 7121211100121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1206271676416 + 3739444801 = 1098304^2 + 61151^2 .

It is an emirp because it is prime and its reverse (7121211100121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1210011121217 - 2⁴ = 1210011121201 is a prime.

It is a super-2 number, since 2×1210011121217² (a number of 25 digits) contains 22 as substring.

Together with 1210011121219, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1210011121219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605005560608 + 605005560609.

It is an arithmetic number, because the mean of its divisors is an integer number (605005560609).

Almost surely, 2^{1210011121217} is an apocalyptic number.

It is an amenable number.

1210011121217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210011121217 is an equidigital number, since it uses as much as digits as its factorization.

1210011121217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 20.

Adding to 1210011121217 its reverse (7121211100121), we get a palindrome (8331222221338).

The spelling of 1210011121217 in words is "one trillion, two hundred ten billion, eleven million, one hundred twenty-one thousand, two hundred seventeen".