20221120217 has 2 divisors, whose sum is σ = 20221120218. Its totient is φ = 20221120216.

The previous prime is 20221120207. The next prime is 20221120219. The reversal of 20221120217 is 71202112202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20215436761 + 5683456 = 142181^2 + 2384^2 .

It is a cyclic number.

It is not a de Polignac number, because 20221120217 - 2¹² = 20221116121 is a prime.

It is a super-2 number, since 2×20221120217² (a number of 21 digits) contains 22 as substring.

Together with 20221120219, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20221120219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110560108 + 10110560109.

It is an arithmetic number, because the mean of its divisors is an integer number (10110560109).

Almost surely, 2^20221120217 is an apocalyptic number.

It is an amenable number.

20221120217 is a deficient number, since it is larger than the sum of its proper divisors (1).

20221120217 is an equidigital number, since it uses as much as digits as its factorization.

20221120217 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 20.

Adding to 20221120217 its reverse (71202112202), we get a palindrome (91423232419).

The spelling of 20221120217 in words is "twenty billion, two hundred twenty-one million, one hundred twenty thousand, two hundred seventeen".