240024140021 has 2 divisors, whose sum is σ = 240024140022. Its totient is φ = 240024140020.

The previous prime is 240024139973. The next prime is 240024140023. The reversal of 240024140021 is 120041420042.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124941040900 + 115083099121 = 353470^2 + 339239^2 .

It is a cyclic number.

It is not a de Polignac number, because 240024140021 - 2³⁴ = 222844270837 is a prime.

It is a super-2 number, since 2×240024140021² (a number of 24 digits) contains 22 as substring.

Together with 240024140023, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 240024139975 and 240024140002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240024140023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120012070010 + 120012070011.

It is an arithmetic number, because the mean of its divisors is an integer number (120012070011).

Almost surely, 2^240024140021 is an apocalyptic number.

It is an amenable number.

240024140021 is a deficient number, since it is larger than the sum of its proper divisors (1).

240024140021 is an equidigital number, since it uses as much as digits as its factorization.

240024140021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 240024140021 its reverse (120041420042), we get a palindrome (360065560063).

The spelling of 240024140021 in words is "two hundred forty billion, twenty-four million, one hundred forty thousand, twenty-one".