100021424 has 10 divisors (see below), whose sum is σ = 193791540. Its totient is φ = 50010704.

The previous prime is 100021409. The next prime is 100021429. The reversal of 100021424 is 424120001.

It is a junction number, because it is equal to n+sod(n) for n = 100021399 and 100021408.

It is not an unprimeable number, because it can be changed into a prime (100021429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3125654 + ... + 3125685.

It is an arithmetic number, because the mean of its divisors is an integer number (19379154).

Almost surely, 2^100021424 is an apocalyptic number.

It is an amenable number.

100021424 is a deficient number, since it is larger than the sum of its proper divisors (93770116).

100021424 is an equidigital number, since it uses as much as digits as its factorization.

100021424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6251347 (or 6251341 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 100021424 is about 10001.0711426327. The cubic root of 100021424 is about 464.1920281275.

Adding to 100021424 its reverse (424120001), we get a palindrome (524141425).

The spelling of 100021424 in words is "one hundred million, twenty-one thousand, four hundred twenty-four".