100021210 has 8 divisors (see below), whose sum is σ = 180038196. Its totient is φ = 40008480.

The previous prime is 100021199. The next prime is 100021223. The reversal of 100021210 is 12120001.

It can be written as a sum of positive squares in 2 ways, for example, as 99980001 + 41209 = 9999^2 + 203^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 100021193 and 100021202.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 5001051 + ... + 5001070.

Almost surely, 2^100021210 is an apocalyptic number.

100021210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

100021210 is a deficient number, since it is larger than the sum of its proper divisors (80016986).

100021210 is a wasteful number, since it uses less digits than its factorization.

100021210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10002128.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 100021210 is about 10001.0604437730. The cubic root of 100021210 is about 464.1916970745.

Adding to 100021210 its reverse (12120001), we get a palindrome (112141211).

The spelling of 100021210 in words is "one hundred million, twenty-one thousand, two hundred ten".