21031210233203 has 2 divisors, whose sum is σ = 21031210233204. Its totient is φ = 21031210233202.

The previous prime is 21031210233197. The next prime is 21031210233251. The reversal of 21031210233203 is 30233201213012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21031210233203 - 2⁶ = 21031210233139 is a prime.

It is not a weakly prime, because it can be changed into another prime (21031210233283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10515605116601 + 10515605116602.

It is an arithmetic number, because the mean of its divisors is an integer number (10515605116602).

Almost surely, 2^{21031210233203} is an apocalyptic number.

21031210233203 is a deficient number, since it is larger than the sum of its proper divisors (1).

21031210233203 is an equidigital number, since it uses as much as digits as its factorization.

21031210233203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 21031210233203 its reverse (30233201213012), we get a palindrome (51264411446215).

The spelling of 21031210233203 in words is "twenty-one trillion, thirty-one billion, two hundred ten million, two hundred thirty-three thousand, two hundred three".