24001010021 has 4 divisors (see below), whose sum is σ = 24248443212. Its totient is φ = 23753576832.

The previous prime is 24001009997. The next prime is 24001010029. The reversal of 24001010021 is 12001010042.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4897900225 + 19103109796 = 69985^2 + 138214^2 .

It is a cyclic number.

It is not a de Polignac number, because 24001010021 - 2¹⁴ = 24000993637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 24001009984 and 24001010011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (24001010029) 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 3 ways as a sum of consecutive naturals, for example, 123716450 + ... + 123716643.

It is an arithmetic number, because the mean of its divisors is an integer number (6062110803).

Almost surely, 2^24001010021 is an apocalyptic number.

It is an amenable number.

24001010021 is a deficient number, since it is larger than the sum of its proper divisors (247433191).

24001010021 is an equidigital number, since it uses as much as digits as its factorization.

24001010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247433190.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 24001010021 its reverse (12001010042), we get a palindrome (36002020063).

The spelling of 24001010021 in words is "twenty-four billion, one million, ten thousand, twenty-one".