1123031020 has 12 divisors (see below), whose sum is σ = 2358365184. Its totient is φ = 449212400.

The previous prime is 1123031009. The next prime is 1123031027. The reversal of 1123031020 is 201303211.

It is a super-2 number, since 2×1123031020² = 2522397343764480800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1123031027) 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, 28075756 + ... + 28075795.

It is an arithmetic number, because the mean of its divisors is an integer number (196530432).

Almost surely, 2^1123031020 is an apocalyptic number.

1123031020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1123031020 is an abundant number, since it is smaller than the sum of its proper divisors (1235334164).

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

1123031020 is a wasteful number, since it uses less digits than its factorization.

1123031020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56151560 (or 56151558 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1123031020 is about 33511.6549874816. The cubic root of 1123031020 is about 1039.4347952035.

Adding to 1123031020 its reverse (201303211), we get a palindrome (1324334231).

The spelling of 1123031020 in words is "one billion, one hundred twenty-three million, thirty-one thousand, twenty".