1131143020 has 48 divisors (see below), whose sum is σ = 2724499008. Its totient is φ = 386426880.

The previous prime is 1131143009. The next prime is 1131143033. The reversal of 1131143020 is 203411311.

It is a junction number, because it is equal to n+sod(n) for n = 1131142985 and 1131143003.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 24964 + ... + 53716.

It is an arithmetic number, because the mean of its divisors is an integer number (56760396).

Almost surely, 2^1131143020 is an apocalyptic number.

1131143020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1131143020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1362249504).

1131143020 is an abundant number, since it is smaller than the sum of its proper divisors (1593355988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1131143020 is a wasteful number, since it uses less digits than its factorization.

1131143020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29050 (or 29048 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1131143020 is about 33632.4697279281. The cubic root of 1131143020 is about 1041.9315128450.

Adding to 1131143020 its reverse (203411311), we get a palindrome (1334554331).

The spelling of 1131143020 in words is "one billion, one hundred thirty-one million, one hundred forty-three thousand, twenty".