21411012443 has 2 divisors, whose sum is σ = 21411012444. Its totient is φ = 21411012442.

The previous prime is 21411012419. The next prime is 21411012449. The reversal of 21411012443 is 34421011412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21411012443 - 2²⁰ = 21409963867 is a prime.

It is not a weakly prime, because it can be changed into another prime (21411012449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10705506221 + 10705506222.

It is an arithmetic number, because the mean of its divisors is an integer number (10705506222).

Almost surely, 2^21411012443 is an apocalyptic number.

21411012443 is a deficient number, since it is larger than the sum of its proper divisors (1).

21411012443 is an equidigital number, since it uses as much as digits as its factorization.

21411012443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 21411012443 its reverse (34421011412), we get a palindrome (55832023855).

The spelling of 21411012443 in words is "twenty-one billion, four hundred eleven million, twelve thousand, four hundred forty-three".