1143232121 has 2 divisors, whose sum is σ = 1143232122. Its totient is φ = 1143232120.

The previous prime is 1143232093. The next prime is 1143232163. The reversal of 1143232121 is 1212323411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1143183721 + 48400 = 33811^2 + 220^2 .

It is a cyclic number.

It is not a de Polignac number, because 1143232121 - 2¹⁸ = 1142969977 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1143232093 and 1143232102.

It is not a weakly prime, because it can be changed into another prime (1143232021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571616060 + 571616061.

It is an arithmetic number, because the mean of its divisors is an integer number (571616061).

Almost surely, 2^1143232121 is an apocalyptic number.

It is an amenable number.

1143232121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143232121 is an equidigital number, since it uses as much as digits as its factorization.

1143232121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 20.

The square root of 1143232121 is about 33811.7157358215. The cubic root of 1143232121 is about 1045.6302512840.

Adding to 1143232121 its reverse (1212323411), we get a palindrome (2355555532).

The spelling of 1143232121 in words is "one billion, one hundred forty-three million, two hundred thirty-two thousand, one hundred twenty-one".