20201222017 has 2 divisors, whose sum is σ = 20201222018. Its totient is φ = 20201222016.

The previous prime is 20201221993. The next prime is 20201222021. The reversal of 20201222017 is 71022210202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18905150016 + 1296072001 = 137496^2 + 36001^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20201222017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20201221985 and 20201222003.

It is not a weakly prime, because it can be changed into another prime (20201222057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100611008 + 10100611009.

It is an arithmetic number, because the mean of its divisors is an integer number (10100611009).

Almost surely, 2^20201222017 is an apocalyptic number.

It is an amenable number.

20201222017 is a deficient number, since it is larger than the sum of its proper divisors (1).

20201222017 is an equidigital number, since it uses as much as digits as its factorization.

20201222017 is an odious number, because the sum of its binary digits is odd.

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

Adding to 20201222017 its reverse (71022210202), we get a palindrome (91223432219).

The spelling of 20201222017 in words is "twenty billion, two hundred one million, two hundred twenty-two thousand, seventeen".