11011212 has 18 divisors (see below), whose sum is σ = 27833988. Its totient is φ = 3670392.

The previous prime is 11011211. The next prime is 11011243. The reversal of 11011212 is 21211011.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 11011194 and 11011203.

It is not an unprimeable number, because it can be changed into a prime (11011211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 152898 + ... + 152969.

Almost surely, 2^11011212 is an apocalyptic number.

11011212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11011212 is an abundant number, since it is smaller than the sum of its proper divisors (16822776).

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

11011212 is a wasteful number, since it uses less digits than its factorization.

11011212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305877 (or 305872 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 11011212 is about 3318.3146324603. The cubic root of 11011212 is about 222.4735448073.

Adding to 11011212 its reverse (21211011), we get a palindrome (32222223).

It can be divided in two parts, 11011 and 212, that multiplied together give a palindrome (2334332).

The spelling of 11011212 in words is "eleven million, eleven thousand, two hundred twelve".