21141241393 has 2 divisors, whose sum is σ = 21141241394. Its totient is φ = 21141241392.

The previous prime is 21141241357. The next prime is 21141241441. The reversal of 21141241393 is 39314214112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11769646144 + 9371595249 = 108488^2 + 96807^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21141241393 is a prime.

It is not a weakly prime, because it can be changed into another prime (21141241343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10570620696 + 10570620697.

It is an arithmetic number, because the mean of its divisors is an integer number (10570620697).

Almost surely, 2^21141241393 is an apocalyptic number.

It is an amenable number.

21141241393 is a deficient number, since it is larger than the sum of its proper divisors (1).

21141241393 is an equidigital number, since it uses as much as digits as its factorization.

21141241393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 31.

The spelling of 21141241393 in words is "twenty-one billion, one hundred forty-one million, two hundred forty-one thousand, three hundred ninety-three".