1113112261 has 2 divisors, whose sum is σ = 1113112262. Its totient is φ = 1113112260.

The previous prime is 1113112193. The next prime is 1113112267. The reversal of 1113112261 is 1622113111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1111889025 + 1223236 = 33345^2 + 1106^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1113112261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1113112267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556556130 + 556556131.

It is an arithmetic number, because the mean of its divisors is an integer number (556556131).

Almost surely, 2^1113112261 is an apocalyptic number.

It is an amenable number.

1113112261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1113112261 is an equidigital number, since it uses as much as digits as its factorization.

1113112261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72, while the sum is 19.

The square root of 1113112261 is about 33363.3370782960. The cubic root of 1113112261 is about 1036.3655995260.

Adding to 1113112261 its reverse (1622113111), we get a palindrome (2735225372).

The spelling of 1113112261 in words is "one billion, one hundred thirteen million, one hundred twelve thousand, two hundred sixty-one".