1131008911 has 4 divisors (see below), whose sum is σ = 1134622672. Its totient is φ = 1127395152.

The previous prime is 1131008909. The next prime is 1131008917. The reversal of 1131008911 is 1198001311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1198001311 = 13 ⋅92153947.

It is a cyclic number.

It is not a de Polignac number, because 1131008911 - 2¹ = 1131008909 is a prime.

It is a super-2 number, since 2×1131008911² = 2558362313522811842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131008917) 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 in 3 ways as a sum of consecutive naturals, for example, 1806411 + ... + 1807036.

It is an arithmetic number, because the mean of its divisors is an integer number (283655668).

Almost surely, 2^1131008911 is an apocalyptic number.

1131008911 is a deficient number, since it is larger than the sum of its proper divisors (3613761).

1131008911 is an equidigital number, since it uses as much as digits as its factorization.

1131008911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3613760.

The product of its (nonzero) digits is 216, while the sum is 25.

The square root of 1131008911 is about 33630.4759258622. The cubic root of 1131008911 is about 1041.8903338743.

The spelling of 1131008911 in words is "one billion, one hundred thirty-one million, eight thousand, nine hundred eleven".