1115436121 has 2 divisors, whose sum is σ = 1115436122. Its totient is φ = 1115436120.

The previous prime is 1115436103. The next prime is 1115436149. The reversal of 1115436121 is 1216345111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1100912400 + 14523721 = 33180^2 + 3811^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1115436121 is a prime.

It is not a weakly prime, because it can be changed into another prime (1115436191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 557718060 + 557718061.

It is an arithmetic number, because the mean of its divisors is an integer number (557718061).

Almost surely, 2^1115436121 is an apocalyptic number.

It is an amenable number.

1115436121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1115436121 is an equidigital number, since it uses as much as digits as its factorization.

1115436121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720, while the sum is 25.

The square root of 1115436121 is about 33398.1454724660. The cubic root of 1115436121 is about 1037.0863098540.

The spelling of 1115436121 in words is "one billion, one hundred fifteen million, four hundred thirty-six thousand, one hundred twenty-one".