20210002217 has 2 divisors, whose sum is σ = 20210002218. Its totient is φ = 20210002216.

The previous prime is 20210002147. The next prime is 20210002247. The reversal of 20210002217 is 71220001202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12955902976 + 7254099241 = 113824^2 + 85171^2 .

It is a cyclic number.

It is not a de Polignac number, because 20210002217 - 2²⁴ = 20193225001 is a prime.

It is a super-2 number, since 2×20210002217² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20210002195 and 20210002204.

It is not a weakly prime, because it can be changed into another prime (20210002247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105001108 + 10105001109.

It is an arithmetic number, because the mean of its divisors is an integer number (10105001109).

Almost surely, 2^20210002217 is an apocalyptic number.

It is an amenable number.

20210002217 is a deficient number, since it is larger than the sum of its proper divisors (1).

20210002217 is an equidigital number, since it uses as much as digits as its factorization.

20210002217 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 17.

Adding to 20210002217 its reverse (71220001202), we get a palindrome (91430003419).

The spelling of 20210002217 in words is "twenty billion, two hundred ten million, two thousand, two hundred seventeen".