4143202121 has 2 divisors, whose sum is σ = 4143202122. Its totient is φ = 4143202120.

The previous prime is 4143202117. The next prime is 4143202171. The reversal of 4143202121 is 1212023414.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2339076496 + 1804125625 = 48364^2 + 42475^2 .

It is a cyclic number.

It is not a de Polignac number, because 4143202121 - 2² = 4143202117 is a prime.

It is a super-2 number, since 2×4143202121² = 34332247630917797282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4143202093 and 4143202102.

It is not a weakly prime, because it can be changed into another prime (4143202171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2071601060 + 2071601061.

It is an arithmetic number, because the mean of its divisors is an integer number (2071601061).

Almost surely, 2^4143202121 is an apocalyptic number.

It is an amenable number.

4143202121 is a deficient number, since it is larger than the sum of its proper divisors (1).

4143202121 is an equidigital number, since it uses as much as digits as its factorization.

4143202121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 4143202121 is about 64367.7102358007. The cubic root of 4143202121 is about 1606.1226503404.

Adding to 4143202121 its reverse (1212023414), we get a palindrome (5355225535).

The spelling of 4143202121 in words is "four billion, one hundred forty-three million, two hundred two thousand, one hundred twenty-one".