21203303223 has 8 divisors (see below), whose sum is σ = 29245935600. Its totient is φ = 13648103168.

The previous prime is 21203303221. The next prime is 21203303293. The reversal of 21203303223 is 32230330212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21203303223 - 2¹ = 21203303221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21203303223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21203303221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121857978 + ... + 121858151.

It is an arithmetic number, because the mean of its divisors is an integer number (3655741950).

Almost surely, 2^21203303223 is an apocalyptic number.

21203303223 is a deficient number, since it is larger than the sum of its proper divisors (8042632377).

21203303223 is a wasteful number, since it uses less digits than its factorization.

21203303223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243716161.

The product of its (nonzero) digits is 1296, while the sum is 21.

Adding to 21203303223 its reverse (32230330212), we get a palindrome (53433633435).

The spelling of 21203303223 in words is "twenty-one billion, two hundred three million, three hundred three thousand, two hundred twenty-three".