1123131000 has 128 divisors (see below), whose sum is σ = 3518199360. Its totient is φ = 298304000.

The previous prime is 1123130933. The next prime is 1123131001. The reversal of 1123131000 is 1313211.

1123131000 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1123131000² = 2522846486322000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123131001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 950410 + ... + 951590.

Almost surely, 2^1123131000 is an apocalyptic number.

1123131000 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 1123131000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1759099680).

1123131000 is an abundant number, since it is smaller than the sum of its proper divisors (2395068360).

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

1123131000 is a wasteful number, since it uses less digits than its factorization.

1123131000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1522 (or 1508 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 1123131000 is about 33513.1466741039. The cubic root of 1123131000 is about 1039.4656401832.

Adding to 1123131000 its reverse (1313211), we get a palindrome (1124444211).

The spelling of 1123131000 in words is "one billion, one hundred twenty-three million, one hundred thirty-one thousand".