20201222211017 has 2 divisors, whose sum is σ = 20201222211018. Its totient is φ = 20201222211016.

The previous prime is 20201222210963. The next prime is 20201222211031. The reversal of 20201222211017 is 71011222210202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18648397187641 + 1552825023376 = 4318379^2 + 1246124^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20201222211017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20201222210983 and 20201222211001.

It is not a weakly prime, because it can be changed into another prime (20201222211047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100611105508 + 10100611105509.

It is an arithmetic number, because the mean of its divisors is an integer number (10100611105509).

Almost surely, 2^{20201222211017} is an apocalyptic number.

It is an amenable number.

20201222211017 is a deficient number, since it is larger than the sum of its proper divisors (1).

20201222211017 is an equidigital number, since it uses as much as digits as its factorization.

20201222211017 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 23.

Adding to 20201222211017 its reverse (71011222210202), we get a palindrome (91212444421219).

The spelling of 20201222211017 in words is "twenty trillion, two hundred one billion, two hundred twenty-two million, two hundred eleven thousand, seventeen".