21011041334203 has 2 divisors, whose sum is σ = 21011041334204. Its totient is φ = 21011041334202.

The previous prime is 21011041334189. The next prime is 21011041334237. The reversal of 21011041334203 is 30243314011012.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21011041334203 is a prime.

It is not a weakly prime, because it can be changed into another prime (21011041334273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505520667101 + 10505520667102.

It is an arithmetic number, because the mean of its divisors is an integer number (10505520667102).

Almost surely, 2^{21011041334203} is an apocalyptic number.

21011041334203 is a deficient number, since it is larger than the sum of its proper divisors (1).

21011041334203 is an equidigital number, since it uses as much as digits as its factorization.

21011041334203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 21011041334203 its reverse (30243314011012), we get a palindrome (51254355345215).

The spelling of 21011041334203 in words is "twenty-one trillion, eleven billion, forty-one million, three hundred thirty-four thousand, two hundred three".