100421212 has 12 divisors (see below), whose sum is σ = 177380280. Its totient is φ = 49741136.

The previous prime is 100421201. The next prime is 100421221. The reversal of 100421212 is 212124001.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 100421192 and 100421201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116887 + ... + 117742.

It is an arithmetic number, because the mean of its divisors is an integer number (14781690).

Almost surely, 2^100421212 is an apocalyptic number.

It is an amenable number.

100421212 is a deficient number, since it is larger than the sum of its proper divisors (76959068).

100421212 is a wasteful number, since it uses less digits than its factorization.

100421212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234740 (or 234738 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 100421212 is about 10021.0384691408. The cubic root of 100421212 is about 464.8096681255.

Adding to 100421212 its reverse (212124001), we get a palindrome (312545213).

The spelling of 100421212 in words is "one hundred million, four hundred twenty-one thousand, two hundred twelve".