21244224713 has 2 divisors, whose sum is σ = 21244224714. Its totient is φ = 21244224712.

The previous prime is 21244224671. The next prime is 21244224761. The reversal of 21244224713 is 31742244212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13245247744 + 7998976969 = 115088^2 + 89437^2 .

It is a cyclic number.

It is not a de Polignac number, because 21244224713 - 2⁶ = 21244224649 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21244224713.

It is not a weakly prime, because it can be changed into another prime (21244224773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10622112356 + 10622112357.

It is an arithmetic number, because the mean of its divisors is an integer number (10622112357).

Almost surely, 2^21244224713 is an apocalyptic number.

It is an amenable number.

21244224713 is a deficient number, since it is larger than the sum of its proper divisors (1).

21244224713 is an equidigital number, since it uses as much as digits as its factorization.

21244224713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21504, while the sum is 32.

Adding to 21244224713 its reverse (31742244212), we get a palindrome (52986468925).

The spelling of 21244224713 in words is "twenty-one billion, two hundred forty-four million, two hundred twenty-four thousand, seven hundred thirteen".