1131109999 has 4 divisors (see below), whose sum is σ = 1141119936. Its totient is φ = 1121100064.

The previous prime is 1131109963. The next prime is 1131110003. The reversal of 1131109999 is 9999011311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9999011311 = 72869 ⋅137219.

It is a cyclic number.

It is not a de Polignac number, because 1131109999 - 2¹⁹ = 1130585711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131179999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5004799 + ... + 5005024.

It is an arithmetic number, because the mean of its divisors is an integer number (285279984).

Almost surely, 2^1131109999 is an apocalyptic number.

1131109999 is a deficient number, since it is larger than the sum of its proper divisors (10009937).

1131109999 is a wasteful number, since it uses less digits than its factorization.

1131109999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10009936.

The product of its (nonzero) digits is 19683, while the sum is 43.

The square root of 1131109999 is about 33631.9788148125. The cubic root of 1131109999 is about 1041.9213738514.

The spelling of 1131109999 in words is "one billion, one hundred thirty-one million, one hundred nine thousand, nine hundred ninety-nine".