100021300 has 18 divisors (see below), whose sum is σ = 217046438. Its totient is φ = 40008480.

The previous prime is 100021297. The next prime is 100021303. The reversal of 100021300 is 3120001.

It is an interprime number because it is at equal distance from previous prime (100021297) and next prime (100021303).

It can be written as a sum of positive squares in 3 ways, for example, as 2643876 + 97377424 = 1626^2 + 9868^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100021303) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 500007 + ... + 500206.

Almost surely, 2^100021300 is an apocalyptic number.

100021300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100021300 is an abundant number, since it is smaller than the sum of its proper divisors (117025138).

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

100021300 is a wasteful number, since it uses less digits than its factorization.

100021300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000227 (or 1000220 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 7.

The square root of 100021300 is about 10001.0649432948. The cubic root of 100021300 is about 464.1918363024.

Adding to 100021300 its reverse (3120001), we get a palindrome (103141301).

The spelling of 100021300 in words is "one hundred million, twenty-one thousand, three hundred".