100242021 has 8 divisors (see below), whose sum is σ = 145806624. Its totient is φ = 60752720.

The previous prime is 100242019. The next prime is 100242029. The reversal of 100242021 is 120242001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 100242021 - 2¹ = 100242019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100241988 and 100242006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100242029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1518786 + ... + 1518851.

It is an arithmetic number, because the mean of its divisors is an integer number (18225828).

Almost surely, 2^100242021 is an apocalyptic number.

100242021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

100242021 is a deficient number, since it is larger than the sum of its proper divisors (45564603).

100242021 is a wasteful number, since it uses less digits than its factorization.

100242021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3037651.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 100242021 is about 10012.0937370762. The cubic root of 100242021 is about 464.5330356714.

Adding to 100242021 its reverse (120242001), we get a palindrome (220484022).

The spelling of 100242021 in words is "one hundred million, two hundred forty-two thousand, twenty-one".