1123131020 has 24 divisors (see below), whose sum is σ = 2572991568. Its totient is φ = 408411200.

The previous prime is 1123131019. The next prime is 1123131029. The reversal of 1123131020 is 201313211.

It is a super-2 number, since 2×1123131020² = 2522846576172480800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1123130986 and 1123131004.

It is not an unprimeable number, because it can be changed into a prime (1123131029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2552351 + ... + 2552790.

It is an arithmetic number, because the mean of its divisors is an integer number (107207982).

Almost surely, 2^1123131020 is an apocalyptic number.

1123131020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1123131020 is an abundant number, since it is smaller than the sum of its proper divisors (1449860548).

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

1123131020 is a wasteful number, since it uses less digits than its factorization.

1123131020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5105161 (or 5105159 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1123131020 is about 33513.1469724942. The cubic root of 1123131020 is about 1039.4656463533.

Adding to 1123131020 its reverse (201313211), we get a palindrome (1324444231).

The spelling of 1123131020 in words is "one billion, one hundred twenty-three million, one hundred thirty-one thousand, twenty".