4020124321 has 2 divisors, whose sum is σ = 4020124322. Its totient is φ = 4020124320.

The previous prime is 4020124319. The next prime is 4020124343. The reversal of 4020124321 is 1234210204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2655856225 + 1364268096 = 51535^2 + 36936^2 .

It is a cyclic number.

It is not a de Polignac number, because 4020124321 - 2¹ = 4020124319 is a prime.

It is a super-2 number, since 2×4020124321² = 32322799112591422082, which contains 22 as substring.

Together with 4020124319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (4020124021) 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, 2010062160 + 2010062161.

It is an arithmetic number, because the mean of its divisors is an integer number (2010062161).

Almost surely, 2^4020124321 is an apocalyptic number.

It is an amenable number.

4020124321 is a deficient number, since it is larger than the sum of its proper divisors (1).

4020124321 is an equidigital number, since it uses as much as digits as its factorization.

4020124321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 4020124321 is about 63404.4503248786. The cubic root of 4020124321 is about 1590.0587139955.

Adding to 4020124321 its reverse (1234210204), we get a palindrome (5254334525).

The spelling of 4020124321 in words is "four billion, twenty million, one hundred twenty-four thousand, three hundred twenty-one".