21202103323 has 2 divisors, whose sum is σ = 21202103324. Its totient is φ = 21202103322.

The previous prime is 21202103309. The next prime is 21202103347. The reversal of 21202103323 is 32330120212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21202103323 - 2⁵ = 21202103291 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21202103323.

It is not a weakly prime, because it can be changed into another prime (21202103123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601051661 + 10601051662.

It is an arithmetic number, because the mean of its divisors is an integer number (10601051662).

Almost surely, 2^21202103323 is an apocalyptic number.

21202103323 is a deficient number, since it is larger than the sum of its proper divisors (1).

21202103323 is an equidigital number, since it uses as much as digits as its factorization.

21202103323 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 21202103323 its reverse (32330120212), we get a palindrome (53532223535).

The spelling of 21202103323 in words is "twenty-one billion, two hundred two million, one hundred three thousand, three hundred twenty-three".