21200031343 has 2 divisors, whose sum is σ = 21200031344. Its totient is φ = 21200031342.

The previous prime is 21200031301. The next prime is 21200031353. The reversal of 21200031343 is 34313000212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21200031343 - 2²⁵ = 21166476911 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21200031343.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21200031353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600015671 + 10600015672.

It is an arithmetic number, because the mean of its divisors is an integer number (10600015672).

Almost surely, 2^21200031343 is an apocalyptic number.

21200031343 is a deficient number, since it is larger than the sum of its proper divisors (1).

21200031343 is an equidigital number, since it uses as much as digits as its factorization.

21200031343 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21200031343 its reverse (34313000212), we get a palindrome (55513031555).

The spelling of 21200031343 in words is "twenty-one billion, two hundred million, thirty-one thousand, three hundred forty-three".