1121135231 has 2 divisors, whose sum is σ = 1121135232. Its totient is φ = 1121135230.

The previous prime is 1121135203. The next prime is 1121135233. The reversal of 1121135231 is 1325311211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1121135231 - 2⁶ = 1121135167 is a prime.

It is a super-2 number, since 2×1121135231² = 2513888412378846722, which contains 22 as substring.

Together with 1121135233, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121135233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560567615 + 560567616.

It is an arithmetic number, because the mean of its divisors is an integer number (560567616).

Almost surely, 2^1121135231 is an apocalyptic number.

1121135231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121135231 is an equidigital number, since it uses as much as digits as its factorization.

1121135231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 180, while the sum is 20.

The square root of 1121135231 is about 33483.3575228053. The cubic root of 1121135231 is about 1038.8495757142.

Adding to 1121135231 its reverse (1325311211), we get a palindrome (2446446442).

The spelling of 1121135231 in words is "one billion, one hundred twenty-one million, one hundred thirty-five thousand, two hundred thirty-one".