1131122011 has 2 divisors, whose sum is σ = 1131122012. Its totient is φ = 1131122010.

The previous prime is 1131121993. The next prime is 1131122023. The reversal of 1131122011 is 1102211311.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1102211311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1131122011 - 2⁷ = 1131121883 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1131121982 and 1131122000.

It is not a weakly prime, because it can be changed into another prime (1131122051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565561005 + 565561006.

It is an arithmetic number, because the mean of its divisors is an integer number (565561006).

Almost surely, 2^1131122011 is an apocalyptic number.

1131122011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131122011 is an equidigital number, since it uses as much as digits as its factorization.

1131122011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 1131122011 is about 33632.1573943748. The cubic root of 1131122011 is about 1041.9250621209.

Adding to 1131122011 its reverse (1102211311), we get a palindrome (2233333322).

The spelling of 1131122011 in words is "one billion, one hundred thirty-one million, one hundred twenty-two thousand, eleven".