21030310100 has 36 divisors (see below), whose sum is σ = 47107901568. Its totient is φ = 8140764000.

The previous prime is 21030310099. The next prime is 21030310123. The reversal of 21030310100 is 101303012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3388886 + ... + 3395085.

Almost surely, 2^21030310100 is an apocalyptic number.

21030310100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21030310100 is an abundant number, since it is smaller than the sum of its proper divisors (26077591468).

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

21030310100 is a wasteful number, since it uses less digits than its factorization.

21030310100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6784016 (or 6784009 counting only the distinct ones).

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

Adding to 21030310100 its reverse (101303012), we get a palindrome (21131613112).

The spelling of 21030310100 in words is "twenty-one billion, thirty million, three hundred ten thousand, one hundred".