21244241071 has 2 divisors, whose sum is σ = 21244241072. Its totient is φ = 21244241070.

The previous prime is 21244241033. The next prime is 21244241129. The reversal of 21244241071 is 17014244212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21244241071 - 2³³ = 12654306479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21244241671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10622120535 + 10622120536.

It is an arithmetic number, because the mean of its divisors is an integer number (10622120536).

Almost surely, 2^21244241071 is an apocalyptic number.

21244241071 is a deficient number, since it is larger than the sum of its proper divisors (1).

21244241071 is an equidigital number, since it uses as much as digits as its factorization.

21244241071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3584, while the sum is 28.

Adding to 21244241071 its reverse (17014244212), we get a palindrome (38258485283).

The spelling of 21244241071 in words is "twenty-one billion, two hundred forty-four million, two hundred forty-one thousand, seventy-one".