1121323141 has 2 divisors, whose sum is σ = 1121323142. Its totient is φ = 1121323140.

The previous prime is 1121323139. The next prime is 1121323187. The reversal of 1121323141 is 1413231211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 732839041 + 388484100 = 27071^2 + 19710^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121323141 - 2¹ = 1121323139 is a prime.

Together with 1121323139, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121323241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560661570 + 560661571.

It is an arithmetic number, because the mean of its divisors is an integer number (560661571).

Almost surely, 2^1121323141 is an apocalyptic number.

It is an amenable number.

1121323141 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121323141 is an equidigital number, since it uses as much as digits as its factorization.

1121323141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144, while the sum is 19.

The square root of 1121323141 is about 33486.1634261078. The cubic root of 1121323141 is about 1038.9076119240.

Adding to 1121323141 its reverse (1413231211), we get a palindrome (2534554352).

The spelling of 1121323141 in words is "one billion, one hundred twenty-one million, three hundred twenty-three thousand, one hundred forty-one".