220021021169 has 2 divisors, whose sum is σ = 220021021170. Its totient is φ = 220021021168.

The previous prime is 220021021159. The next prime is 220021021223. The reversal of 220021021169 is 961120120022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 216187801600 + 3833219569 = 464960^2 + 61913^2 .

It is a cyclic number.

It is not a de Polignac number, because 220021021169 - 2¹⁶ = 220020955633 is a prime.

It is a super-2 number, since 2×220021021169² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (220021021159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110010510584 + 110010510585.

It is an arithmetic number, because the mean of its divisors is an integer number (110010510585).

Almost surely, 2^220021021169 is an apocalyptic number.

It is an amenable number.

220021021169 is a deficient number, since it is larger than the sum of its proper divisors (1).

220021021169 is an equidigital number, since it uses as much as digits as its factorization.

220021021169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 26.

The spelling of 220021021169 in words is "two hundred twenty billion, twenty-one million, twenty-one thousand, one hundred sixty-nine".