21443133134399 has 2 divisors, whose sum is σ = 21443133134400. Its totient is φ = 21443133134398.

The previous prime is 21443133134393. The next prime is 21443133134413. The reversal of 21443133134399 is 99343133134412.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21443133134399 - 2¹² = 21443133130303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21443133134393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10721566567199 + 10721566567200.

It is an arithmetic number, because the mean of its divisors is an integer number (10721566567200).

Almost surely, 2^{21443133134399} is an apocalyptic number.

21443133134399 is a deficient number, since it is larger than the sum of its proper divisors (1).

21443133134399 is an equidigital number, since it uses as much as digits as its factorization.

21443133134399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2519424, while the sum is 50.

The spelling of 21443133134399 in words is "twenty-one trillion, four hundred forty-three billion, one hundred thirty-three million, one hundred thirty-four thousand, three hundred ninety-nine".