1123231320 has 64 divisors (see below), whose sum is σ = 3744108000. Its totient is φ = 299528064.

The previous prime is 1123231297. The next prime is 1123231331. The reversal of 1123231320 is 231323211.

1123231320 is a `hidden beast` number, since 112 + 3 + 231 + 320 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1123231293 and 1123231302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 518935 + ... + 521094.

Almost surely, 2^1123231320 is an apocalyptic number.

1123231320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1123231320 is an abundant number, since it is smaller than the sum of its proper divisors (2620876680).

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

1123231320 is a wasteful number, since it uses less digits than its factorization.

1123231320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040049 (or 1040039 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1123231320 is about 33514.6433667434. The cubic root of 1123231320 is about 1039.4965882170.

Adding to 1123231320 its reverse (231323211), we get a palindrome (1354554531).

The spelling of 1123231320 in words is "one billion, one hundred twenty-three million, two hundred thirty-one thousand, three hundred twenty".