11123130012 has 48 divisors (see below), whose sum is σ = 26379709440. Its totient is φ = 3647161728.

The previous prime is 11123130001. The next prime is 11123130019. The reversal of 11123130012 is 21003132111.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 11123129973 and 11123130000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11123130019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 315253 + ... + 348755.

It is an arithmetic number, because the mean of its divisors is an integer number (549577280).

Almost surely, 2^11123130012 is an apocalyptic number.

11123130012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11123130012 is an abundant number, since it is smaller than the sum of its proper divisors (15256579428).

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

11123130012 is a wasteful number, since it uses less digits than its factorization.

11123130012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33962 (or 33960 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 11123130012 its reverse (21003132111), we get a palindrome (32126262123).

The spelling of 11123130012 in words is "eleven billion, one hundred twenty-three million, one hundred thirty thousand, twelve".