21203014043 has 2 divisors, whose sum is σ = 21203014044. Its totient is φ = 21203014042.

The previous prime is 21203014037. The next prime is 21203014087. The reversal of 21203014043 is 34041030212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21203014043 - 2³² = 16908046747 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (21203019043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601507021 + 10601507022.

It is an arithmetic number, because the mean of its divisors is an integer number (10601507022).

Almost surely, 2^21203014043 is an apocalyptic number.

21203014043 is a deficient number, since it is larger than the sum of its proper divisors (1).

21203014043 is an equidigital number, since it uses as much as digits as its factorization.

21203014043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21203014043 its reverse (34041030212), we get a palindrome (55244044255).

The spelling of 21203014043 in words is "twenty-one billion, two hundred three million, fourteen thousand, forty-three".