12122222117 has 2 divisors, whose sum is σ = 12122222118. Its totient is φ = 12122222116.

The previous prime is 12122222027. The next prime is 12122222153. The reversal of 12122222117 is 71122222121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11344593121 + 777628996 = 106511^2 + 27886^2 .

It is a cyclic number.

It is not a de Polignac number, because 12122222117 - 2³⁰ = 11048480293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12122222092 and 12122222101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12122225117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6061111058 + 6061111059.

It is an arithmetic number, because the mean of its divisors is an integer number (6061111059).

Almost surely, 2^12122222117 is an apocalyptic number.

It is an amenable number.

12122222117 is a deficient number, since it is larger than the sum of its proper divisors (1).

12122222117 is an equidigital number, since it uses as much as digits as its factorization.

12122222117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 448, while the sum is 23.

Adding to 12122222117 its reverse (71122222121), we get a palindrome (83244444238).

The spelling of 12122222117 in words is "twelve billion, one hundred twenty-two million, two hundred twenty-two thousand, one hundred seventeen".