11133211212 has 36 divisors (see below), whose sum is σ = 29184593256. Its totient is φ = 3711070080.

The previous prime is 11133211211. The next prime is 11133211231. The reversal of 11133211212 is 21211233111.

11133211212 is a `hidden beast` number, since 111 + 332 + 11 + 212 = 666.

11133211212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (11133211211) 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 11 ways as a sum of consecutive naturals, for example, 5725989 + ... + 5727932.

It is an arithmetic number, because the mean of its divisors is an integer number (810683146).

Almost surely, 2^11133211212 is an apocalyptic number.

11133211212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11133211212 is an abundant number, since it is smaller than the sum of its proper divisors (18051382044).

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

11133211212 is a wasteful number, since it uses less digits than its factorization.

11133211212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11453940 (or 11453926 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

Adding to 11133211212 its reverse (21211233111), we get a palindrome (32344444323).

The spelling of 11133211212 in words is "eleven billion, one hundred thirty-three million, two hundred eleven thousand, two hundred twelve".