11212130028 has 24 divisors (see below), whose sum is σ = 28539967680. Its totient is φ = 3397615120.

The previous prime is 11212130023. The next prime is 11212130029. The reversal of 11212130028 is 82003121211.

11212130028 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 11212129986 and 11212130013.

It is not an unprimeable number, because it can be changed into a prime (11212130023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42470058 + ... + 42470321.

It is an arithmetic number, because the mean of its divisors is an integer number (1189165320).

Almost surely, 2^11212130028 is an apocalyptic number.

It is an amenable number.

11212130028 is an abundant number, since it is smaller than the sum of its proper divisors (17327837652).

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

11212130028 is a wasteful number, since it uses less digits than its factorization.

11212130028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84940397 (or 84940395 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 11212130028 its reverse (82003121211), we get a palindrome (93215251239).

The spelling of 11212130028 in words is "eleven billion, two hundred twelve million, one hundred thirty thousand, twenty-eight".