21303021010303 has 32 divisors (see below), whose sum is σ = 22999477374720. Its totient is φ = 19657675445760.

The previous prime is 21303021010267. The next prime is 21303021010307. The reversal of 21303021010303 is 30301012030312.

It is a cyclic number.

It is not a de Polignac number, because 21303021010303 - 2³⁷ = 21165582056831 is a prime.

It is a super-2 number, since 2×21303021010303² (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 (21303021010307) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1048212100 + ... + 1048232422.

It is an arithmetic number, because the mean of its divisors is an integer number (718733667960).

Almost surely, 2^{21303021010303} is an apocalyptic number.

21303021010303 is a deficient number, since it is larger than the sum of its proper divisors (1696456364417).

21303021010303 is a wasteful number, since it uses less digits than its factorization.

21303021010303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23127.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21303021010303 its reverse (30301012030312), we get a palindrome (51604033040615).

The spelling of 21303021010303 in words is "twenty-one trillion, three hundred three billion, twenty-one million, ten thousand, three hundred three".