21232030243 has 2 divisors, whose sum is σ = 21232030244. Its totient is φ = 21232030242.

The previous prime is 21232030213. The next prime is 21232030247. The reversal of 21232030243 is 34203023212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21232030243 - 2²⁵ = 21198475811 is a prime.

It is not a weakly prime, because it can be changed into another prime (21232030247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10616015121 + 10616015122.

It is an arithmetic number, because the mean of its divisors is an integer number (10616015122).

Almost surely, 2^21232030243 is an apocalyptic number.

21232030243 is a deficient number, since it is larger than the sum of its proper divisors (1).

21232030243 is an equidigital number, since it uses as much as digits as its factorization.

21232030243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 21232030243 its reverse (34203023212), we get a palindrome (55435053455).

The spelling of 21232030243 in words is "twenty-one billion, two hundred thirty-two million, thirty thousand, two hundred forty-three".