11221123312 has 20 divisors (see below), whose sum is σ = 24846773296. Its totient is φ = 4809052800.

The previous prime is 11221123307. The next prime is 11221123313. The reversal of 11221123312 is 21332112211.

It is a self number, because there is not a number n which added to its sum of digits gives 11221123312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221123313) 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, 50094189 + ... + 50094412.

Almost surely, 2^11221123312 is an apocalyptic number.

It is an amenable number.

11221123312 is an abundant number, since it is smaller than the sum of its proper divisors (13625649984).

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

11221123312 is a wasteful number, since it uses less digits than its factorization.

11221123312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100188616 (or 100188610 counting only the distinct ones).

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

Adding to 11221123312 its reverse (21332112211), we get a palindrome (32553235523).

The spelling of 11221123312 in words is "eleven billion, two hundred twenty-one million, one hundred twenty-three thousand, three hundred twelve".