21203103000 has 128 divisors (see below), whose sum is σ = 66228477120. Its totient is φ = 5647769600.

The previous prime is 21203102983. The next prime is 21203103041. The reversal of 21203103000 is 30130212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3035512 + ... + 3042488.

Almost surely, 2^21203103000 is an apocalyptic number.

21203103000 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 21203103000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33114238560).

21203103000 is an abundant number, since it is smaller than the sum of its proper divisors (45025374120).

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

21203103000 is a wasteful number, since it uses less digits than its factorization.

21203103000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8014 (or 8000 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 21203103000 its reverse (30130212), we get a palindrome (21233233212).

The spelling of 21203103000 in words is "twenty-one billion, two hundred three million, one hundred three thousand".