11011011001212 has 48 divisors (see below), whose sum is σ = 26931071768832. Its totient is φ = 3497541774720.

The previous prime is 11011011001129. The next prime is 11011011001217. The reversal of 11011011001212 is 21210011011011.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011011001217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 260212608 + ... + 260254919.

It is an arithmetic number, because the mean of its divisors is an integer number (561063995184).

Almost surely, 2^{11011011001212} is an apocalyptic number.

11011011001212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11011011001212 is an abundant number, since it is smaller than the sum of its proper divisors (15920060767620).

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

11011011001212 is a wasteful number, since it uses less digits than its factorization.

11011011001212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520467618 (or 520467616 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 11011011001212 its reverse (21210011011011), we get a palindrome (32221022012223).

The spelling of 11011011001212 in words is "eleven trillion, eleven billion, eleven million, one thousand, two hundred twelve".