24240121021 has 4 divisors (see below), whose sum is σ = 24246628672. Its totient is φ = 24233613372.

The previous prime is 24240121001. The next prime is 24240121049. The reversal of 24240121021 is 12012104242.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 24240121021 - 2¹⁵ = 24240088253 is a prime.

It is a super-2 number, since 2×24240121021² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 24240121021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (24240121001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3248235 + ... + 3255688.

It is an arithmetic number, because the mean of its divisors is an integer number (6061657168).

Almost surely, 2^24240121021 is an apocalyptic number.

It is an amenable number.

24240121021 is a deficient number, since it is larger than the sum of its proper divisors (6507651).

24240121021 is an equidigital number, since it uses as much as digits as its factorization.

24240121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6507650.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 24240121021 its reverse (12012104242), we get a palindrome (36252225263).

The spelling of 24240121021 in words is "twenty-four billion, two hundred forty million, one hundred twenty-one thousand, twenty-one".