21301303303223 has 16 divisors (see below), whose sum is σ = 22195928832000. Its totient is φ = 20419743846240.

The previous prime is 21301303303211. The next prime is 21301303303243. The reversal of 21301303303223 is 32230330310312.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21301303303223 - 2⁴ = 21301303303207 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21301303303192 and 21301303303201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21301303303243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12237128 + ... + 13869026.

It is an arithmetic number, because the mean of its divisors is an integer number (1387245552000).

Almost surely, 2^{21301303303223} is an apocalyptic number.

21301303303223 is a deficient number, since it is larger than the sum of its proper divisors (894625528777).

21301303303223 is a wasteful number, since it uses less digits than its factorization.

21301303303223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1635902.

The product of its (nonzero) digits is 5832, while the sum is 26.

Adding to 21301303303223 its reverse (32230330310312), we get a palindrome (53531633613535).

The spelling of 21301303303223 in words is "twenty-one trillion, three hundred one billion, three hundred three million, three hundred three thousand, two hundred twenty-three".