21303011223 has 24 divisors (see below), whose sum is σ = 34882127280. Its totient is φ = 12419568000.

The previous prime is 21303011221. The next prime is 21303011291. The reversal of 21303011223 is 32211030312.

It is not a de Polignac number, because 21303011223 - 2¹ = 21303011221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21303011196 and 21303011205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21303011221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4789278 + ... + 4793723.

It is an arithmetic number, because the mean of its divisors is an integer number (1453421970).

Almost surely, 2^21303011223 is an apocalyptic number.

21303011223 is a deficient number, since it is larger than the sum of its proper divisors (13579116057).

21303011223 is a wasteful number, since it uses less digits than its factorization.

21303011223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9583039 (or 9583036 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21303011223 its reverse (32211030312), we get a palindrome (53514041535).

The spelling of 21303011223 in words is "twenty-one billion, three hundred three million, eleven thousand, two hundred twenty-three".