11123321212 has 24 divisors (see below), whose sum is σ = 19803193200. Its totient is φ = 5465337216.

The previous prime is 11123321177. The next prime is 11123321239. The reversal of 11123321212 is 21212332111.

It is a self number, because there is not a number n which added to its sum of digits gives 11123321212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 760464 + ... + 774952.

It is an arithmetic number, because the mean of its divisors is an integer number (825133050).

Almost surely, 2^11123321212 is an apocalyptic number.

It is an amenable number.

11123321212 is a deficient number, since it is larger than the sum of its proper divisors (8679871988).

11123321212 is a wasteful number, since it uses less digits than its factorization.

11123321212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17805 (or 17803 counting only the distinct ones).

The product of its digits is 144, while the sum is 19.

Adding to 11123321212 its reverse (21212332111), we get a palindrome (32335653323).

The spelling of 11123321212 in words is "eleven billion, one hundred twenty-three million, three hundred twenty-one thousand, two hundred twelve".