11220021212 has 12 divisors (see below), whose sum is σ = 19661612040. Its totient is φ = 5602417776.

The previous prime is 11220021191. The next prime is 11220021217. The reversal of 11220021212 is 21212002211.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11220021217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1894883 + ... + 1900794.

It is an arithmetic number, because the mean of its divisors is an integer number (1638467670).

Almost surely, 2^11220021212 is an apocalyptic number.

It is an amenable number.

11220021212 is a deficient number, since it is larger than the sum of its proper divisors (8441590828).

11220021212 is a wasteful number, since it uses less digits than its factorization.

11220021212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3796420 (or 3796418 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 11220021212 its reverse (21212002211), we get a palindrome (32432023423).

The spelling of 11220021212 in words is "eleven billion, two hundred twenty million, twenty-one thousand, two hundred twelve".