21222014513543 has 2 divisors, whose sum is σ = 21222014513544. Its totient is φ = 21222014513542.

The previous prime is 21222014513537. The next prime is 21222014513671. The reversal of 21222014513543 is 34531541022212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21222014513543 - 2²² = 21222010319239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21222014513533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611007256771 + 10611007256772.

It is an arithmetic number, because the mean of its divisors is an integer number (10611007256772).

Almost surely, 2^{21222014513543} is an apocalyptic number.

21222014513543 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222014513543 is an equidigital number, since it uses as much as digits as its factorization.

21222014513543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 57600, while the sum is 35.

Adding to 21222014513543 its reverse (34531541022212), we get a palindrome (55753555535755).

The spelling of 21222014513543 in words is "twenty-one trillion, two hundred twenty-two billion, fourteen million, five hundred thirteen thousand, five hundred forty-three".