24012421021 has 2 divisors, whose sum is σ = 24012421022. Its totient is φ = 24012421020.

The previous prime is 24012421019. The next prime is 24012421039. The reversal of 24012421021 is 12012421042.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22283025625 + 1729395396 = 149275^2 + 41586^2 .

It is a cyclic number.

It is not a de Polignac number, because 24012421021 - 2¹ = 24012421019 is a prime.

Together with 24012421019, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 24012421021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (24012421091) 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 as a sum of consecutive naturals, namely, 12006210510 + 12006210511.

It is an arithmetic number, because the mean of its divisors is an integer number (12006210511).

Almost surely, 2^24012421021 is an apocalyptic number.

It is an amenable number.

24012421021 is a deficient number, since it is larger than the sum of its proper divisors (1).

24012421021 is an equidigital number, since it uses as much as digits as its factorization.

24012421021 is an odious number, because the sum of its binary digits is odd.

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

Adding to 24012421021 its reverse (12012421042), we get a palindrome (36024842063).

The spelling of 24012421021 in words is "twenty-four billion, twelve million, four hundred twenty-one thousand, twenty-one".