20020012011217 has 2 divisors, whose sum is σ = 20020012011218. Its totient is φ = 20020012011216.

The previous prime is 20020012011191. The next prime is 20020012011257. The reversal of 20020012011217 is 71211021002002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14808612454416 + 5211399556801 = 3848196^2 + 2282849^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20020012011217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20020012011194 and 20020012011203.

It is not a weakly prime, because it can be changed into another prime (20020012011257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010006005608 + 10010006005609.

It is an arithmetic number, because the mean of its divisors is an integer number (10010006005609).

Almost surely, 2^{20020012011217} is an apocalyptic number.

It is an amenable number.

20020012011217 is a deficient number, since it is larger than the sum of its proper divisors (1).

20020012011217 is an equidigital number, since it uses as much as digits as its factorization.

20020012011217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 19.

Adding to 20020012011217 its reverse (71211021002002), we get a palindrome (91231033013219).

The spelling of 20020012011217 in words is "twenty trillion, twenty billion, twelve million, eleven thousand, two hundred seventeen".