20212002221017 has 2 divisors, whose sum is σ = 20212002221018. Its totient is φ = 20212002221016.

The previous prime is 20212002220967. The next prime is 20212002221027. The reversal of 20212002221017 is 71012220021202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20187866734281 + 24135486736 = 4493091^2 + 155356^2 .

It is a cyclic number.

It is not a de Polignac number, because 20212002221017 - 2⁷ = 20212002220889 is a prime.

It is a super-2 number, since 2×20212002221017² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20212002221027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106001110508 + 10106001110509.

It is an arithmetic number, because the mean of its divisors is an integer number (10106001110509).

Almost surely, 2^{20212002221017} is an apocalyptic number.

It is an amenable number.

20212002221017 is a deficient number, since it is larger than the sum of its proper divisors (1).

20212002221017 is an equidigital number, since it uses as much as digits as its factorization.

20212002221017 is an odious number, because the sum of its binary digits is odd.

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

Adding to 20212002221017 its reverse (71012220021202), we get a palindrome (91224222242219).

The spelling of 20212002221017 in words is "twenty trillion, two hundred twelve billion, two million, two hundred twenty-one thousand, seventeen".