21202344043 has 2 divisors, whose sum is σ = 21202344044. Its totient is φ = 21202344042.

The previous prime is 21202344029. The next prime is 21202344047. The reversal of 21202344043 is 34044320212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21202344043 - 2¹³ = 21202335851 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21202343999 and 21202344017.

It is not a weakly prime, because it can be changed into another prime (21202344047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601172021 + 10601172022.

It is an arithmetic number, because the mean of its divisors is an integer number (10601172022).

Almost surely, 2^21202344043 is an apocalyptic number.

21202344043 is a deficient number, since it is larger than the sum of its proper divisors (1).

21202344043 is an equidigital number, since it uses as much as digits as its factorization.

21202344043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 21202344043 its reverse (34044320212), we get a palindrome (55246664255).

The spelling of 21202344043 in words is "twenty-one billion, two hundred two million, three hundred forty-four thousand, forty-three".