1212122011117 has 2 divisors, whose sum is σ = 1212122011118. Its totient is φ = 1212122011116.

The previous prime is 1212122011063. The next prime is 1212122011123. The reversal of 1212122011117 is 7111102212121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1207699894116 + 4422117001 = 1098954^2 + 66499^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212122011117 - 2¹¹ = 1212122009069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212122012117) 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, 606061005558 + 606061005559.

It is an arithmetic number, because the mean of its divisors is an integer number (606061005559).

Almost surely, 2^{1212122011117} is an apocalyptic number.

It is an amenable number.

1212122011117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212122011117 is an equidigital number, since it uses as much as digits as its factorization.

1212122011117 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 22.

Adding to 1212122011117 its reverse (7111102212121), we get a palindrome (8323224223238).

The spelling of 1212122011117 in words is "one trillion, two hundred twelve billion, one hundred twenty-two million, eleven thousand, one hundred seventeen".