11123100012 has 24 divisors (see below), whose sum is σ = 27082331136. Its totient is φ = 3546495568.

The previous prime is 11123099993. The next prime is 11123100019. The reversal of 11123100012 is 21000132111.

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

It is not an unprimeable number, because it can be changed into a prime (11123100019) 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, 20150268 + ... + 20150819.

It is an arithmetic number, because the mean of its divisors is an integer number (1128430464).

Almost surely, 2^11123100012 is an apocalyptic number.

11123100012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11123100012 is an abundant number, since it is smaller than the sum of its proper divisors (15959231124).

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

11123100012 is a wasteful number, since it uses less digits than its factorization.

11123100012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40301117 (or 40301115 counting only the distinct ones).

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

Adding to 11123100012 its reverse (21000132111), we get a palindrome (32123232123).

The spelling of 11123100012 in words is "eleven billion, one hundred twenty-three million, one hundred thousand, twelve".