21302010100 has 54 divisors (see below), whose sum is σ = 53772372150. Its totient is φ = 7303544640.

The previous prime is 21302010077. The next prime is 21302010193. The reversal of 21302010100 is 101020312.

It can be written as a sum of positive squares in 3 ways, for example, as 25120144 + 21276889956 = 5012^2 + 145866^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

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 17 ways as a sum of consecutive naturals, for example, 2168775 + ... + 2178574.

Almost surely, 2^21302010100 is an apocalyptic number.

21302010100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21302010100 is an abundant number, since it is smaller than the sum of its proper divisors (32470362050).

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

21302010100 is a wasteful number, since it uses less digits than its factorization.

21302010100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4347377 (or 4347363 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 21302010100 its reverse (101020312), we get a palindrome (21403030412).

The spelling of 21302010100 in words is "twenty-one billion, three hundred two million, ten thousand, one hundred".