1131123113 has 4 divisors (see below), whose sum is σ = 1131335040. Its totient is φ = 1130911188.

The previous prime is 1131123089. The next prime is 1131123121. The reversal of 1131123113 is 3113211311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1131123113 - 2²⁰ = 1130074537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1131123091 and 1131123100.

It is not an unprimeable number, because it can be changed into a prime (1131123173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97745 + ... + 108702.

It is an arithmetic number, because the mean of its divisors is an integer number (282833760).

Almost surely, 2^1131123113 is an apocalyptic number.

It is an amenable number.

1131123113 is a deficient number, since it is larger than the sum of its proper divisors (211927).

1131123113 is an equidigital number, since it uses as much as digits as its factorization.

1131123113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211926.

The product of its digits is 54, while the sum is 17.

The square root of 1131123113 is about 33632.1737775006. The cubic root of 1131123113 is about 1041.9254004873.

Adding to 1131123113 its reverse (3113211311), we get a palindrome (4244334424).

The spelling of 1131123113 in words is "one billion, one hundred thirty-one million, one hundred twenty-three thousand, one hundred thirteen".