21224203000 has 576 divisors, whose sum is σ = 68539180320. Its totient is φ = 6080256000.

The previous prime is 21224202997. The next prime is 21224203003. The reversal of 21224203000 is 30242212.

It is an interprime number because it is at equal distance from previous prime (21224202997) and next prime (21224203003).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21224203003) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 91090884 + ... + 91091116.

Almost surely, 2^21224203000 is an apocalyptic number.

21224203000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21224203000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34269590160).

21224203000 is an abundant number, since it is smaller than the sum of its proper divisors (47314977320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21224203000 is a wasteful number, since it uses less digits than its factorization.

21224203000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305 (or 271 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 21224203000 its reverse (30242212), we get a palindrome (21254445212).

The spelling of 21224203000 in words is "twenty-one billion, two hundred twenty-four million, two hundred three thousand".