11121122012 has 192 divisors, whose sum is σ = 27449985024. Its totient is φ = 3800079360.

The previous prime is 11121122011. The next prime is 11121122027. The reversal of 11121122012 is 21022112111.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121122011) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 18141818 + ... + 18142430.

It is an arithmetic number, because the mean of its divisors is an integer number (142968672).

Almost surely, 2^11121122012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11121122012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13724992512).

11121122012 is an abundant number, since it is smaller than the sum of its proper divisors (16328863012).

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

11121122012 is a wasteful number, since it uses less digits than its factorization.

11121122012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868 (or 866 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11121122012 its reverse (21022112111), we get a palindrome (32143234123).

Subtracting 11121122012 from its reverse (21022112111), we obtain a palindrome (9900990099).

The spelling of 11121122012 in words is "eleven billion, one hundred twenty-one million, one hundred twenty-two thousand, twelve".