21323212363 has 2 divisors, whose sum is σ = 21323212364. Its totient is φ = 21323212362.

The previous prime is 21323212291. The next prime is 21323212397. The reversal of 21323212363 is 36321232312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21323212363 - 2²⁹ = 20786341451 is a prime.

It is not a weakly prime, because it can be changed into another prime (21323219363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10661606181 + 10661606182.

It is an arithmetic number, because the mean of its divisors is an integer number (10661606182).

Almost surely, 2^21323212363 is an apocalyptic number.

21323212363 is a deficient number, since it is larger than the sum of its proper divisors (1).

21323212363 is an equidigital number, since it uses as much as digits as its factorization.

21323212363 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 28.

Adding to 21323212363 its reverse (36321232312), we get a palindrome (57644444675).

The spelling of 21323212363 in words is "twenty-one billion, three hundred twenty-three million, two hundred twelve thousand, three hundred sixty-three".