100021204 has 18 divisors (see below), whose sum is σ = 182982170. Its totient is φ = 47835216.

The previous prime is 100021199. The next prime is 100021223. The reversal of 100021204 is 402120001.

It can be written as a sum of positive squares in only one way, i.e., 55532304 + 44488900 = 7452^2 + 6670^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21519 + ... + 25750.

Almost surely, 2^100021204 is an apocalyptic number.

It is an amenable number.

100021204 is a deficient number, since it is larger than the sum of its proper divisors (82960966).

100021204 is a wasteful number, since it uses less digits than its factorization.

100021204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47319 (or 47294 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 100021204 is about 10001.0601438048. The cubic root of 100021204 is about 464.1916877926.

Adding to 100021204 its reverse (402120001), we get a palindrome (502141205).

The spelling of 100021204 in words is "one hundred million, twenty-one thousand, two hundred four".