221012222222117 has 2 divisors, whose sum is σ = 221012222222118. Its totient is φ = 221012222222116.

The previous prime is 221012222222101. The next prime is 221012222222191. The reversal of 221012222222117 is 711222222210122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 218253613481281 + 2758608740836 = 14773409^2 + 1660906^2 .

It is a cyclic number.

It is not a de Polignac number, because 221012222222117 - 2⁴ = 221012222222101 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221012222222117.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221012222222317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110506111111058 + 110506111111059.

It is an arithmetic number, because the mean of its divisors is an integer number (110506111111059).

Almost surely, 2^{221012222222117} is an apocalyptic number.

It is an amenable number.

221012222222117 is a deficient number, since it is larger than the sum of its proper divisors (1).

221012222222117 is an equidigital number, since it uses as much as digits as its factorization.

221012222222117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3584, while the sum is 29.

Adding to 221012222222117 its reverse (711222222210122), we get a palindrome (932234444432239).

The spelling of 221012222222117 in words is "two hundred twenty-one trillion, twelve billion, two hundred twenty-two million, two hundred twenty-two thousand, one hundred seventeen".