21323212003 has 2 divisors, whose sum is σ = 21323212004. Its totient is φ = 21323212002.

The previous prime is 21323211991. The next prime is 21323212039. The reversal of 21323212003 is 30021232312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21323212003 - 2²⁹ = 20786341091 is a prime.

It is not a weakly prime, because it can be changed into another prime (21323212093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10661606001 + 10661606002.

It is an arithmetic number, because the mean of its divisors is an integer number (10661606002).

Almost surely, 2^21323212003 is an apocalyptic number.

21323212003 is a deficient number, since it is larger than the sum of its proper divisors (1).

21323212003 is an equidigital number, since it uses as much as digits as its factorization.

21323212003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21323212003 its reverse (30021232312), we get a palindrome (51344444315).

The spelling of 21323212003 in words is "twenty-one billion, three hundred twenty-three million, two hundred twelve thousand, three".