100021020200 has 24 divisors (see below), whose sum is σ = 232548872430. Its totient is φ = 40008408000.

The previous prime is 100021020167. The next prime is 100021020217. The reversal of 100021020200 is 2020120001.

It can be written as a sum of positive squares in 3 ways, for example, as 59611175716 + 40409844484 = 244154^2 + 201022^2 .

It is a Harshad number since it is a multiple of its sum of digits (8).

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 5 ways as a sum of consecutive naturals, for example, 250052351 + ... + 250052750.

Almost surely, 2^100021020200 is an apocalyptic number.

100021020200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100021020200 is an abundant number, since it is smaller than the sum of its proper divisors (132527852230).

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

100021020200 is a wasteful number, since it uses less digits than its factorization.

100021020200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500105117 (or 500105108 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

Adding to 100021020200 its reverse (2020120001), we get a palindrome (102041140201).

The spelling of 100021020200 in words is "one hundred billion, twenty-one million, twenty thousand, two hundred".