212221202020117 has 2 divisors, whose sum is σ = 212221202020118. Its totient is φ = 212221202020116.

The previous prime is 212221202020049. The next prime is 212221202020129. The reversal of 212221202020117 is 711020202122212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120196819291761 + 92024382728356 = 10963431^2 + 9592934^2 .

It is a cyclic number.

It is not a de Polignac number, because 212221202020117 - 2¹⁵ = 212221201987349 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212221202020091 and 212221202020100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212221202021117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106110601010058 + 106110601010059.

It is an arithmetic number, because the mean of its divisors is an integer number (106110601010059).

Almost surely, 2^{212221202020117} is an apocalyptic number.

It is an amenable number.

212221202020117 is a deficient number, since it is larger than the sum of its proper divisors (1).

212221202020117 is an equidigital number, since it uses as much as digits as its factorization.

212221202020117 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 25.

Adding to 212221202020117 its reverse (711020202122212), we get a palindrome (923241404142329).

The spelling of 212221202020117 in words is "two hundred twelve trillion, two hundred twenty-one billion, two hundred two million, twenty thousand, one hundred seventeen".