11211212 has 24 divisors (see below), whose sum is σ = 21138432. Its totient is φ = 5187600.

The previous prime is 11211209. The next prime is 11211217. The reversal of 11211212 is 21211211.

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

It is a junction number, because it is equal to n+sod(n) for n = 11211193 and 11211202.

It is not an unprimeable number, because it can be changed into a prime (11211217) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 887 + ... + 4817.

It is an arithmetic number, because the mean of its divisors is an integer number (880768).

Almost surely, 2^11211212 is an apocalyptic number.

It is an amenable number.

11211212 is a deficient number, since it is larger than the sum of its proper divisors (9927220).

11211212 is a wasteful number, since it uses less digits than its factorization.

11211212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3989 (or 3987 counting only the distinct ones).

The product of its digits is 8, while the sum is 11.

The square root of 11211212 is about 3348.3148000151. The cubic root of 11211212 is about 223.8124226862.

Adding to 11211212 its reverse (21211211), we get a palindrome (32422423).

Subtracting 11211212 from its reverse (21211211), we obtain a palindrome (9999999).

It can be divided in two parts, 11211 and 212, that multiplied together give a palindrome (2376732).

The spelling of 11211212 in words is "eleven million, two hundred eleven thousand, two hundred twelve".