21203303213223 has 24 divisors (see below), whose sum is σ = 32482513471200. Its totient is φ = 13299292100160.

The previous prime is 21203303213219. The next prime is 21203303213377. The reversal of 21203303213223 is 32231230330212.

21203303213223 is a `hidden beast` number, since 2 + 1 + 2 + 0 + 330 + 3 + 2 + 1 + 322 + 3 = 666.

It is not a de Polignac number, because 21203303213223 - 2² = 21203303213219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21203303217223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 839589148 + ... + 839614401.

It is an arithmetic number, because the mean of its divisors is an integer number (1353438061300).

Almost surely, 2^{21203303213223} is an apocalyptic number.

21203303213223 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21203303213223 is a deficient number, since it is larger than the sum of its proper divisors (11279210257977).

21203303213223 is a wasteful number, since it uses less digits than its factorization.

21203303213223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1679203639 (or 1679203636 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 27.

Adding to 21203303213223 its reverse (32231230330212), we get a palindrome (53434533543435).

The spelling of 21203303213223 in words is "twenty-one trillion, two hundred three billion, three hundred three million, two hundred thirteen thousand, two hundred twenty-three".