20021022211361 has 2 divisors, whose sum is σ = 20021022211362. Its totient is φ = 20021022211360.

The previous prime is 20021022211303. The next prime is 20021022211543. The reversal of 20021022211361 is 16311222012002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19716654838336 + 304367373025 = 4440344^2 + 551695^2 .

It is a cyclic number.

It is not a de Polignac number, because 20021022211361 - 2⁶ = 20021022211297 is a prime.

It is not a weakly prime, because it can be changed into another prime (20021022210361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010511105680 + 10010511105681.

It is an arithmetic number, because the mean of its divisors is an integer number (10010511105681).

Almost surely, 2^{20021022211361} is an apocalyptic number.

It is an amenable number.

20021022211361 is a deficient number, since it is larger than the sum of its proper divisors (1).

20021022211361 is an equidigital number, since it uses as much as digits as its factorization.

20021022211361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 20021022211361 its reverse (16311222012002), we get a palindrome (36332244223363).

The spelling of 20021022211361 in words is "twenty trillion, twenty-one billion, twenty-two million, two hundred eleven thousand, three hundred sixty-one".