21303201220303 has 2 divisors, whose sum is σ = 21303201220304. Its totient is φ = 21303201220302.

The previous prime is 21303201220277. The next prime is 21303201220313. The reversal of 21303201220303 is 30302210230312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21303201220303 - 2⁵ = 21303201220271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21303201220313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10651600610151 + 10651600610152.

It is an arithmetic number, because the mean of its divisors is an integer number (10651600610152).

Almost surely, 2^{21303201220303} is an apocalyptic number.

21303201220303 is a deficient number, since it is larger than the sum of its proper divisors (1).

21303201220303 is an equidigital number, since it uses as much as digits as its factorization.

21303201220303 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21303201220303 its reverse (30302210230312), we get a palindrome (51605411450615).

The spelling of 21303201220303 in words is "twenty-one trillion, three hundred three billion, two hundred one million, two hundred twenty thousand, three hundred three".