1212241220117 has 2 divisors, whose sum is σ = 1212241220118. Its totient is φ = 1212241220116.

The previous prime is 1212241220087. The next prime is 1212241220137. The reversal of 1212241220117 is 7110221422121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1209733814641 + 2507405476 = 1099879^2 + 50074^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212241220117 - 2¹⁰ = 1212241219093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212241220137) 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, 606120610058 + 606120610059.

It is an arithmetic number, because the mean of its divisors is an integer number (606120610059).

Almost surely, 2^{1212241220117} is an apocalyptic number.

It is an amenable number.

1212241220117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212241220117 is an equidigital number, since it uses as much as digits as its factorization.

1212241220117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 26.

Adding to 1212241220117 its reverse (7110221422121), we get a palindrome (8322462642238).

The spelling of 1212241220117 in words is "one trillion, two hundred twelve billion, two hundred forty-one million, two hundred twenty thousand, one hundred seventeen".