21033303023203 has 2 divisors, whose sum is σ = 21033303023204. Its totient is φ = 21033303023202.

The previous prime is 21033303023197. The next prime is 21033303023269. The reversal of 21033303023203 is 30232030333012.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21033303023203 is a prime.

It is not a weakly prime, because it can be changed into another prime (21033303023903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10516651511601 + 10516651511602.

It is an arithmetic number, because the mean of its divisors is an integer number (10516651511602).

Almost surely, 2^{21033303023203} is an apocalyptic number.

21033303023203 is a deficient number, since it is larger than the sum of its proper divisors (1).

21033303023203 is an equidigital number, since it uses as much as digits as its factorization.

21033303023203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 25.

Adding to 21033303023203 its reverse (30232030333012), we get a palindrome (51265333356215).

The spelling of 21033303023203 in words is "twenty-one trillion, thirty-three billion, three hundred three million, twenty-three thousand, two hundred three".