1131120523 has 4 divisors (see below), whose sum is σ = 1218129808. Its totient is φ = 1044111240.

The previous prime is 1131120493. The next prime is 1131120533. The reversal of 1131120523 is 3250211311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3250211311 = 389 ⋅8355299.

It is a cyclic number.

It is not a de Polignac number, because 1131120523 - 2²⁹ = 594249611 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1131120523.

It is not an unprimeable number, because it can be changed into a prime (1131120533) 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, 43504623 + ... + 43504648.

It is an arithmetic number, because the mean of its divisors is an integer number (304532452).

Almost surely, 2^1131120523 is an apocalyptic number.

1131120523 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1131120523 is a deficient number, since it is larger than the sum of its proper divisors (87009285).

1131120523 is an equidigital number, since it uses as much as digits as its factorization.

1131120523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87009284.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 1131120523 is about 33632.1352726823. The cubic root of 1131120523 is about 1041.9246052338.

Adding to 1131120523 its reverse (3250211311), we get a palindrome (4381331834).

The spelling of 1131120523 in words is "one billion, one hundred thirty-one million, one hundred twenty thousand, five hundred twenty-three".