4343232121 has 2 divisors, whose sum is σ = 4343232122. Its totient is φ = 4343232120.

The previous prime is 4343232119. The next prime is 4343232137. The reversal of 4343232121 is 1212323434.

4343232121 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2382513721 + 1960718400 = 48811^2 + 44280^2 .

It is a cyclic number.

It is not a de Polignac number, because 4343232121 - 2¹ = 4343232119 is a prime.

Together with 4343232119, it forms a pair of twin primes.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (4343232191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2171616060 + 2171616061.

It is an arithmetic number, because the mean of its divisors is an integer number (2171616061).

Almost surely, 2^4343232121 is an apocalyptic number.

It is an amenable number.

4343232121 is a deficient number, since it is larger than the sum of its proper divisors (1).

4343232121 is an equidigital number, since it uses as much as digits as its factorization.

4343232121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 25.

The square root of 4343232121 is about 65903.2026611757. The cubic root of 4343232121 is about 1631.5648741495.

Adding to 4343232121 its reverse (1212323434), we get a palindrome (5555555555).

The spelling of 4343232121 in words is "four billion, three hundred forty-three million, two hundred thirty-two thousand, one hundred twenty-one".