11221212112 has 20 divisors (see below), whose sum is σ = 23717562336. Its totient is φ = 5100550880.

The previous prime is 11221212097. The next prime is 11221212131. The reversal of 11221212112 is 21121212211.

11221212112 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (16).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31878268 + ... + 31878619.

Almost surely, 2^11221212112 is an apocalyptic number.

It is an amenable number.

11221212112 is an abundant number, since it is smaller than the sum of its proper divisors (12496350224).

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

11221212112 is a wasteful number, since it uses less digits than its factorization.

11221212112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63756906 (or 63756900 counting only the distinct ones).

The product of its digits is 32, while the sum is 16.

Adding to 11221212112 its reverse (21121212211), we get a palindrome (32342424323).

Subtracting 11221212112 from its reverse (21121212211), we obtain a palindrome (9900000099).

The spelling of 11221212112 in words is "eleven billion, two hundred twenty-one million, two hundred twelve thousand, one hundred twelve".