20122210217 has 2 divisors, whose sum is σ = 20122210218. Its totient is φ = 20122210216.

The previous prime is 20122210201. The next prime is 20122210223. The reversal of 20122210217 is 71201222102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20000747776 + 121462441 = 141424^2 + 11021^2 .

It is a cyclic number.

It is not a de Polignac number, because 20122210217 - 2⁴ = 20122210201 is a prime.

It is not a weakly prime, because it can be changed into another prime (20122210247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061105108 + 10061105109.

It is an arithmetic number, because the mean of its divisors is an integer number (10061105109).

Almost surely, 2^20122210217 is an apocalyptic number.

It is an amenable number.

20122210217 is a deficient number, since it is larger than the sum of its proper divisors (1).

20122210217 is an equidigital number, since it uses as much as digits as its factorization.

20122210217 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 20.

Adding to 20122210217 its reverse (71201222102), we get a palindrome (91323432319).

The spelling of 20122210217 in words is "twenty billion, one hundred twenty-two million, two hundred ten thousand, two hundred seventeen".