21044203030343 has 2 divisors, whose sum is σ = 21044203030344. Its totient is φ = 21044203030342.

The previous prime is 21044203030337. The next prime is 21044203030373. The reversal of 21044203030343 is 34303030244012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21044203030343 - 2⁴ = 21044203030327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21044203030313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10522101515171 + 10522101515172.

It is an arithmetic number, because the mean of its divisors is an integer number (10522101515172).

Almost surely, 2^{21044203030343} is an apocalyptic number.

21044203030343 is a deficient number, since it is larger than the sum of its proper divisors (1).

21044203030343 is an equidigital number, since it uses as much as digits as its factorization.

21044203030343 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 29.

Adding to 21044203030343 its reverse (34303030244012), we get a palindrome (55347233274355).

The spelling of 21044203030343 in words is "twenty-one trillion, forty-four billion, two hundred three million, thirty thousand, three hundred forty-three".