21244224269 has 2 divisors, whose sum is σ = 21244224270. Its totient is φ = 21244224268.

The previous prime is 21244224179. The next prime is 21244224299. The reversal of 21244224269 is 96242244212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19625208100 + 1619016169 = 140090^2 + 40237^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21244224269 is a prime.

It is a super-2 number, since 2×21244224269² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21244224299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10622112134 + 10622112135.

It is an arithmetic number, because the mean of its divisors is an integer number (10622112135).

Almost surely, 2^21244224269 is an apocalyptic number.

It is an amenable number.

21244224269 is a deficient number, since it is larger than the sum of its proper divisors (1).

21244224269 is an equidigital number, since it uses as much as digits as its factorization.

21244224269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 110592, while the sum is 38.

The spelling of 21244224269 in words is "twenty-one billion, two hundred forty-four million, two hundred twenty-four thousand, two hundred sixty-nine".