21001210220303 has 2 divisors, whose sum is σ = 21001210220304. Its totient is φ = 21001210220302.

The previous prime is 21001210220191. The next prime is 21001210220317. The reversal of 21001210220303 is 30302201210012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21001210220303 - 2¹⁶ = 21001210154767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21001210228303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500605110151 + 10500605110152.

It is an arithmetic number, because the mean of its divisors is an integer number (10500605110152).

Almost surely, 2^{21001210220303} is an apocalyptic number.

21001210220303 is a deficient number, since it is larger than the sum of its proper divisors (1).

21001210220303 is an equidigital number, since it uses as much as digits as its factorization.

21001210220303 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21001210220303 its reverse (30302201210012), we get a palindrome (51303411430315).

The spelling of 21001210220303 in words is "twenty-one trillion, one billion, two hundred ten million, two hundred twenty thousand, three hundred three".