21202133243 has 2 divisors, whose sum is σ = 21202133244. Its totient is φ = 21202133242.

The previous prime is 21202133201. The next prime is 21202133279. The reversal of 21202133243 is 34233120212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21202133243 - 2¹⁸ = 21201871099 is a prime.

It is not a weakly prime, because it can be changed into another prime (21202133143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601066621 + 10601066622.

It is an arithmetic number, because the mean of its divisors is an integer number (10601066622).

Almost surely, 2^21202133243 is an apocalyptic number.

21202133243 is a deficient number, since it is larger than the sum of its proper divisors (1).

21202133243 is an equidigital number, since it uses as much as digits as its factorization.

21202133243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21202133243 its reverse (34233120212), we get a palindrome (55435253455).

The spelling of 21202133243 in words is "twenty-one billion, two hundred two million, one hundred thirty-three thousand, two hundred forty-three".