220020021021217 has 2 divisors, whose sum is σ = 220020021021218. Its totient is φ = 220020021021216.

The previous prime is 220020021021191. The next prime is 220020021021253. The reversal of 220020021021217 is 712120120020022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 217235291121216 + 2784729900001 = 14738904^2 + 1668751^2 .

It is a cyclic number.

It is not a de Polignac number, because 220020021021217 - 2³¹ = 220017873537569 is a prime.

It is a super-2 number, since 2×220020021021217² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (220020021021917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110010010510608 + 110010010510609.

It is an arithmetic number, because the mean of its divisors is an integer number (110010010510609).

Almost surely, 2^{220020021021217} is an apocalyptic number.

It is an amenable number.

220020021021217 is a deficient number, since it is larger than the sum of its proper divisors (1).

220020021021217 is an equidigital number, since it uses as much as digits as its factorization.

220020021021217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 22.

Adding to 220020021021217 its reverse (712120120020022), we get a palindrome (932140141041239).

The spelling of 220020021021217 in words is "two hundred twenty trillion, twenty billion, twenty-one million, twenty-one thousand, two hundred seventeen".