21441051040243 has 2 divisors, whose sum is σ = 21441051040244. Its totient is φ = 21441051040242.

The previous prime is 21441051040147. The next prime is 21441051040303. The reversal of 21441051040243 is 34204015014412.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21441051040243 is a prime.

It is not a weakly prime, because it can be changed into another prime (21441051040543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10720525520121 + 10720525520122.

It is an arithmetic number, because the mean of its divisors is an integer number (10720525520122).

Almost surely, 2^{21441051040243} is an apocalyptic number.

21441051040243 is a deficient number, since it is larger than the sum of its proper divisors (1).

21441051040243 is an equidigital number, since it uses as much as digits as its factorization.

21441051040243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15360, while the sum is 31.

Adding to 21441051040243 its reverse (34204015014412), we get a palindrome (55645066054655).

The spelling of 21441051040243 in words is "twenty-one trillion, four hundred forty-one billion, fifty-one million, forty thousand, two hundred forty-three".