1113151181 has 2 divisors, whose sum is σ = 1113151182. Its totient is φ = 1113151180.

The previous prime is 1113151153. The next prime is 1113151219. The reversal of 1113151181 is 1811513111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 777015625 + 336135556 = 27875^2 + 18334^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1113151181 is a prime.

It is a super-2 number, since 2×1113151181² = 2478211103523389522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1113151141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556575590 + 556575591.

It is an arithmetic number, because the mean of its divisors is an integer number (556575591).

Almost surely, 2^1113151181 is an apocalyptic number.

It is an amenable number.

1113151181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1113151181 is an equidigital number, since it uses as much as digits as its factorization.

1113151181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120, while the sum is 23.

The square root of 1113151181 is about 33363.9203481845. The cubic root of 1113151181 is about 1036.3776782355.

Adding to 1113151181 its reverse (1811513111), we get a palindrome (2924664292).

The spelling of 1113151181 in words is "one billion, one hundred thirteen million, one hundred fifty-one thousand, one hundred eighty-one".