20012200221217 has 2 divisors, whose sum is σ = 20012200221218. Its totient is φ = 20012200221216.

The previous prime is 20012200221191. The next prime is 20012200221227. The reversal of 20012200221217 is 71212200221002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15165175274001 + 4847024947216 = 3894249^2 + 2201596^2 .

It is a cyclic number.

It is not a de Polignac number, because 20012200221217 - 2⁷ = 20012200221089 is a prime.

It is a super-2 number, since 2×20012200221217² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20012200221227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006100110608 + 10006100110609.

It is an arithmetic number, because the mean of its divisors is an integer number (10006100110609).

Almost surely, 2^{20012200221217} is an apocalyptic number.

It is an amenable number.

20012200221217 is a deficient number, since it is larger than the sum of its proper divisors (1).

20012200221217 is an equidigital number, since it uses as much as digits as its factorization.

20012200221217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 22.

Adding to 20012200221217 its reverse (71212200221002), we get a palindrome (91224400442219).

The spelling of 20012200221217 in words is "twenty trillion, twelve billion, two hundred million, two hundred twenty-one thousand, two hundred seventeen".