21030130100 has 216 divisors, whose sum is σ = 54615462720. Its totient is φ = 6884720640.

The previous prime is 21030130081. The next prime is 21030130127. The reversal of 21030130100 is 103103012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 81829172 + ... + 81829428.

Almost surely, 2^21030130100 is an apocalyptic number.

21030130100 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 21030130100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27307731360).

21030130100 is an abundant number, since it is smaller than the sum of its proper divisors (33585332620).

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

21030130100 is a wasteful number, since it uses less digits than its factorization.

21030130100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475 (or 439 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 11.

Adding to 21030130100 its reverse (103103012), we get a palindrome (21133233112).

The spelling of 21030130100 in words is "twenty-one billion, thirty million, one hundred thirty thousand, one hundred".