1121241643 has 2 divisors, whose sum is σ = 1121241644. Its totient is φ = 1121241642.

The previous prime is 1121241631. The next prime is 1121241677. The reversal of 1121241643 is 3461421211.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1121241643 is a prime.

It is not a weakly prime, because it can be changed into another prime (1121242643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560620821 + 560620822.

It is an arithmetic number, because the mean of its divisors is an integer number (560620822).

Almost surely, 2^1121241643 is an apocalyptic number.

1121241643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121241643 is an equidigital number, since it uses as much as digits as its factorization.

1121241643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 25.

The square root of 1121241643 is about 33484.9465133215. The cubic root of 1121241643 is about 1038.8824419735.

Adding to 1121241643 its reverse (3461421211), we get a palindrome (4582662854).

The spelling of 1121241643 in words is "one billion, one hundred twenty-one million, two hundred forty-one thousand, six hundred forty-three".