21222223355243 has 2 divisors, whose sum is σ = 21222223355244. Its totient is φ = 21222223355242.

The previous prime is 21222223355129. The next prime is 21222223355299. The reversal of 21222223355243 is 34255332222212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21222223355243 - 2⁴⁰ = 20122711727467 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21222223355197 and 21222223355206.

It is not a weakly prime, because it can be changed into another prime (21222223855243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611111677621 + 10611111677622.

It is an arithmetic number, because the mean of its divisors is an integer number (10611111677622).

Almost surely, 2^{21222223355243} is an apocalyptic number.

21222223355243 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222223355243 is an equidigital number, since it uses as much as digits as its factorization.

21222223355243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 345600, while the sum is 38.

Adding to 21222223355243 its reverse (34255332222212), we get a palindrome (55477555577455).

The spelling of 21222223355243 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred twenty-three million, three hundred fifty-five thousand, two hundred forty-three".