22121126117 has 2 divisors, whose sum is σ = 22121126118. Its totient is φ = 22121126116.

The previous prime is 22121126081. The next prime is 22121126129. The reversal of 22121126117 is 71162112122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18885905476 + 3235220641 = 137426^2 + 56879^2 .

It is a cyclic number.

It is not a de Polignac number, because 22121126117 - 2⁸ = 22121125861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22121126177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060563058 + 11060563059.

It is an arithmetic number, because the mean of its divisors is an integer number (11060563059).

Almost surely, 2^22121126117 is an apocalyptic number.

It is an amenable number.

22121126117 is a deficient number, since it is larger than the sum of its proper divisors (1).

22121126117 is an equidigital number, since it uses as much as digits as its factorization.

22121126117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 672, while the sum is 26.

Adding to 22121126117 its reverse (71162112122), we get a palindrome (93283238239).

The spelling of 22121126117 in words is "twenty-two billion, one hundred twenty-one million, one hundred twenty-six thousand, one hundred seventeen".