21010002020303 has 4 divisors (see below), whose sum is σ = 21019521733440. Its totient is φ = 21000482307168.

The previous prime is 21010002020251. The next prime is 21010002020309. The reversal of 21010002020303 is 30302020001012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21010002020303 - 2⁸ = 21010002020047 is a prime.

It is a super-2 number, since 2×21010002020303² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010002020309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4759853258 + ... + 4759857671.

It is an arithmetic number, because the mean of its divisors is an integer number (5254880433360).

Almost surely, 2^{21010002020303} is an apocalyptic number.

21010002020303 is a deficient number, since it is larger than the sum of its proper divisors (9519713137).

21010002020303 is an equidigital number, since it uses as much as digits as its factorization.

21010002020303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9519713136.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 21010002020303 its reverse (30302020001012), we get a palindrome (51312022021315).

The spelling of 21010002020303 in words is "twenty-one trillion, ten billion, two million, twenty thousand, three hundred three".