21310023232303 has 16 divisors (see below), whose sum is σ = 23181298398720. Its totient is φ = 19472175799776.

The previous prime is 21310023232283. The next prime is 21310023232343. The reversal of 21310023232303 is 30323232001312.

It is a cyclic number.

It is not a de Polignac number, because 21310023232303 - 2⁵ = 21310023232271 is a prime.

It is a super-2 number, since 2×21310023232303² (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 (21310023232343) 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 in 15 ways as a sum of consecutive naturals, for example, 3972675 + ... + 7642132.

It is an arithmetic number, because the mean of its divisors is an integer number (1448831149920).

Almost surely, 2^{21310023232303} is an apocalyptic number.

21310023232303 is a deficient number, since it is larger than the sum of its proper divisors (1871275166417).

21310023232303 is a wasteful number, since it uses less digits than its factorization.

21310023232303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11616246.

The product of its (nonzero) digits is 3888, while the sum is 25.

Adding to 21310023232303 its reverse (30323232001312), we get a palindrome (51633255233615).

The spelling of 21310023232303 in words is "twenty-one trillion, three hundred ten billion, twenty-three million, two hundred thirty-two thousand, three hundred three".