100021125 has 32 divisors (see below), whose sum is σ = 168030720. Its totient is φ = 52833600.

The previous prime is 100021121. The next prime is 100021127. The reversal of 100021125 is 521120001.

It is not a de Polignac number, because 100021125 - 2² = 100021121 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 100021125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100021121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39652 + ... + 42098.

It is an arithmetic number, because the mean of its divisors is an integer number (5250960).

Almost surely, 2^100021125 is an apocalyptic number.

100021125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

100021125 is a deficient number, since it is larger than the sum of its proper divisors (68009595).

100021125 is a wasteful number, since it uses less digits than its factorization.

100021125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2574 (or 2564 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 100021125 is about 10001.0561942227. The cubic root of 100021125 is about 464.1915655814.

Adding to 100021125 its reverse (521120001), we get a palindrome (621141126).

The spelling of 100021125 in words is "one hundred million, twenty-one thousand, one hundred twenty-five".