100002021 has 16 divisors (see below), whose sum is σ = 153484800. Its totient is φ = 56731248.

The previous prime is 100002017. The next prime is 100002031. The reversal of 100002021 is 120200001.

It is a happy number.

It is not a de Polignac number, because 100002021 - 2² = 100002017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100002011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14211 + ... + 20048.

It is an arithmetic number, because the mean of its divisors is an integer number (9592800).

Almost surely, 2^100002021 is an apocalyptic number.

It is an amenable number.

100002021 is a deficient number, since it is larger than the sum of its proper divisors (53482779).

100002021 is a wasteful number, since it uses less digits than its factorization.

100002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34408.

The product of its (nonzero) digits is 4, while the sum is 6.

The square root of 100002021 is about 10000.1010494895. The cubic root of 100002021 is about 464.1620102239.

Adding to 100002021 its reverse (120200001), we get a palindrome (220202022).

It can be divided in two parts, 10000 and 2021, that added together give a palindrome (12021).

The spelling of 100002021 in words is "one hundred million, two thousand, twenty-one".