100421224 has 16 divisors (see below), whose sum is σ = 188396100. Its totient is φ = 50182272.

The previous prime is 100421221. The next prime is 100421231. The reversal of 100421224 is 422124001.

It can be written as a sum of positive squares in 2 ways, for example, as 81324324 + 19096900 = 9018^2 + 4370^2 .

It is a junction number, because it is equal to n+sod(n) for n = 100421198 and 100421207.

It is not an unprimeable number, because it can be changed into a prime (100421221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26454 + ... + 30010.

Almost surely, 2^100421224 is an apocalyptic number.

It is an amenable number.

100421224 is a deficient number, since it is larger than the sum of its proper divisors (87974876).

100421224 is a wasteful number, since it uses less digits than its factorization.

100421224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7092 (or 7088 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 100421224 is about 10021.0390678811. The cubic root of 100421224 is about 464.8096866399.

Adding to 100421224 its reverse (422124001), we get a palindrome (522545225).

The spelling of 100421224 in words is "one hundred million, four hundred twenty-one thousand, two hundred twenty-four".