1131131011 has 2 divisors, whose sum is σ = 1131131012. Its totient is φ = 1131131010.

The previous prime is 1131131003. The next prime is 1131131021. The reversal of 1131131011 is 1101311311.

It is a weak prime.

It is an emirp because it is prime and its reverse (1101311311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1131131011 - 2³ = 1131131003 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1131130982 and 1131131000.

It is not a weakly prime, because it can be changed into another prime (1131131021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565565505 + 565565506.

It is an arithmetic number, because the mean of its divisors is an integer number (565565506).

Almost surely, 2^1131131011 is an apocalyptic number.

1131131011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131131011 is an equidigital number, since it uses as much as digits as its factorization.

1131131011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9, while the sum is 13.

The square root of 1131131011 is about 33632.2911946243. The cubic root of 1131131011 is about 1041.9278255424.

Adding to 1131131011 its reverse (1101311311), we get a palindrome (2232442322).

The spelling of 1131131011 in words is "one billion, one hundred thirty-one million, one hundred thirty-one thousand, eleven".