100121424 has 80 divisors (see below), whose sum is σ = 280023744. Its totient is φ = 30643200.

The previous prime is 100121423. The next prime is 100121429. The reversal of 100121424 is 424121001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100121423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 175059 + ... + 175629.

Almost surely, 2^100121424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 100121424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140011872).

100121424 is an abundant number, since it is smaller than the sum of its proper divisors (179902320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

100121424 is a wasteful number, since it uses less digits than its factorization.

100121424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876 (or 870 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 100121424 is about 10006.0693581446. The cubic root of 100121424 is about 464.3466741349.

Adding to 100121424 its reverse (424121001), we get a palindrome (524242425).

The spelling of 100121424 in words is "one hundred million, one hundred twenty-one thousand, four hundred twenty-four".