11011121212 has 96 divisors (see below), whose sum is σ = 24754875264. Its totient is φ = 4169318400.

The previous prime is 11011121201. The next prime is 11011121237. The reversal of 11011121212 is 21212111011.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 11011121192 and 11011121201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 784012 + ... + 797932.

It is an arithmetic number, because the mean of its divisors is an integer number (257863284).

Almost surely, 2^11011121212 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 11011121212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12377437632).

11011121212 is an abundant number, since it is smaller than the sum of its proper divisors (13743754052).

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

11011121212 is a wasteful number, since it uses less digits than its factorization.

11011121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14039 (or 14037 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11011121212 its reverse (21212111011), we get a palindrome (32223232223).

The spelling of 11011121212 in words is "eleven billion, eleven million, one hundred twenty-one thousand, two hundred twelve".