20011022117 has 2 divisors, whose sum is σ = 20011022118. Its totient is φ = 20011022116.

The previous prime is 20011022113. The next prime is 20011022149. The reversal of 20011022117 is 71122011002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10025816641 + 9985205476 = 100129^2 + 99926^2 .

It is a cyclic number.

It is not a de Polignac number, because 20011022117 - 2² = 20011022113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20011022095 and 20011022104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20011022111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005511058 + 10005511059.

It is an arithmetic number, because the mean of its divisors is an integer number (10005511059).

Almost surely, 2^20011022117 is an apocalyptic number.

It is an amenable number.

20011022117 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011022117 is an equidigital number, since it uses as much as digits as its factorization.

20011022117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56, while the sum is 17.

Adding to 20011022117 its reverse (71122011002), we get a palindrome (91133033119).

The spelling of 20011022117 in words is "twenty billion, eleven million, twenty-two thousand, one hundred seventeen".