20212220201317 has 2 divisors, whose sum is σ = 20212220201318. Its totient is φ = 20212220201316.

The previous prime is 20212220201297. The next prime is 20212220201321. The reversal of 20212220201317 is 71310202221202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17003013087841 + 3209207113476 = 4123471^2 + 1791426^2 .

It is a cyclic number.

It is not a de Polignac number, because 20212220201317 - 2²⁷ = 20212085983589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20212220201291 and 20212220201300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20212220201357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106110100658 + 10106110100659.

It is an arithmetic number, because the mean of its divisors is an integer number (10106110100659).

Almost surely, 2^{20212220201317} is an apocalyptic number.

It is an amenable number.

20212220201317 is a deficient number, since it is larger than the sum of its proper divisors (1).

20212220201317 is an equidigital number, since it uses as much as digits as its factorization.

20212220201317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 25.

Adding to 20212220201317 its reverse (71310202221202), we get a palindrome (91522422422519).

The spelling of 20212220201317 in words is "twenty trillion, two hundred twelve billion, two hundred twenty million, two hundred one thousand, three hundred seventeen".