100221424 has 10 divisors (see below), whose sum is σ = 194179040. Its totient is φ = 50110704.

The previous prime is 100221389. The next prime is 100221427. The reversal of 100221424 is 424122001.

It is a Harshad number since it is a multiple of its sum of digits (16), and also a Moran number because the ratio is a prime number: 6263839 = 100221424 / (1 + 0 + 0 + 2 + 2 + 1 + 4 + 2 + 4).

It is a junction number, because it is equal to n+sod(n) for n = 100221398 and 100221407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100221427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3131904 + ... + 3131935.

It is an arithmetic number, because the mean of its divisors is an integer number (19417904).

Almost surely, 2^100221424 is an apocalyptic number.

It is an amenable number.

100221424 is a deficient number, since it is larger than the sum of its proper divisors (93957616).

100221424 is an equidigital number, since it uses as much as digits as its factorization.

100221424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6263847 (or 6263841 counting only the distinct ones).

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

The square root of 100221424 is about 10011.0650782022. The cubic root of 100221424 is about 464.5012172043.

Adding to 100221424 its reverse (424122001), we get a palindrome (524343425).

The spelling of 100221424 in words is "one hundred million, two hundred twenty-one thousand, four hundred twenty-four".