21203000103000 has 256 divisors, whose sum is σ = 66402250761600. Its totient is φ = 5632895846400.

The previous prime is 21203000102953. The next prime is 21203000103011. The reversal of 21203000103000 is 30100030212.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1023448642 + ... + 1023469358.

Almost surely, 2^{21203000103000} is an apocalyptic number.

21203000103000 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 21203000103000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33201125380800).

21203000103000 is an abundant number, since it is smaller than the sum of its proper divisors (45199250658600).

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

21203000103000 is a wasteful number, since it uses less digits than its factorization.

21203000103000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22007 (or 21993 counting only the distinct ones).

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

Adding to 21203000103000 its reverse (30100030212), we get a palindrome (21233100133212).

The spelling of 21203000103000 in words is "twenty-one trillion, two hundred three billion, one hundred three thousand".