4143124421 has 2 divisors, whose sum is σ = 4143124422. Its totient is φ = 4143124420.

The previous prime is 4143124397. The next prime is 4143124459. The reversal of 4143124421 is 1244213414.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4133075521 + 10048900 = 64289^2 + 3170^2 .

It is a cyclic number.

It is not a de Polignac number, because 4143124421 - 2⁶ = 4143124357 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4143124721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2071562210 + 2071562211.

It is an arithmetic number, because the mean of its divisors is an integer number (2071562211).

Almost surely, 2^4143124421 is an apocalyptic number.

It is an amenable number.

4143124421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4143124421 is an equidigital number, since it uses as much as digits as its factorization.

4143124421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3072, while the sum is 26.

The square root of 4143124421 is about 64367.1066694783. The cubic root of 4143124421 is about 1606.1126100780.

Adding to 4143124421 its reverse (1244213414), we get a palindrome (5387337835).

The spelling of 4143124421 in words is "four billion, one hundred forty-three million, one hundred twenty-four thousand, four hundred twenty-one".