20220000021217 has 2 divisors, whose sum is σ = 20220000021218. Its totient is φ = 20220000021216.

The previous prime is 20220000021197. The next prime is 20220000021233. The reversal of 20220000021217 is 71212000002202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15544757123856 + 4675242897361 = 3942684^2 + 2162231^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20220000021217 is a prime.

It is a super-2 number, since 2×20220000021217² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20220000021194 and 20220000021203.

It is not a weakly prime, because it can be changed into another prime (20220000021517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110000010608 + 10110000010609.

It is an arithmetic number, because the mean of its divisors is an integer number (10110000010609).

Almost surely, 2^{20220000021217} is an apocalyptic number.

It is an amenable number.

20220000021217 is a deficient number, since it is larger than the sum of its proper divisors (1).

20220000021217 is an equidigital number, since it uses as much as digits as its factorization.

20220000021217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 19.

Adding to 20220000021217 its reverse (71212000002202), we get a palindrome (91432000023419).

The spelling of 20220000021217 in words is "twenty trillion, two hundred twenty billion, twenty-one thousand, two hundred seventeen".