1121231113 has 2 divisors, whose sum is σ = 1121231114. Its totient is φ = 1121231112.

The previous prime is 1121231101. The next prime is 1121231143. The reversal of 1121231113 is 3111321211.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 856615824 + 264615289 = 29268^2 + 16267^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121231113 - 2⁵ = 1121231081 is a prime.

It is not a weakly prime, because it can be changed into another prime (1121231143) 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, 560615556 + 560615557.

It is an arithmetic number, because the mean of its divisors is an integer number (560615557).

Almost surely, 2^1121231113 is an apocalyptic number.

It is an amenable number.

1121231113 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121231113 is an equidigital number, since it uses as much as digits as its factorization.

1121231113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36, while the sum is 16.

The square root of 1121231113 is about 33484.7892781185. The cubic root of 1121231113 is about 1038.8791897853.

Adding to 1121231113 its reverse (3111321211), we get a palindrome (4232552324).

The spelling of 1121231113 in words is "one billion, one hundred twenty-one million, two hundred thirty-one thousand, one hundred thirteen".