11121221221112 has 16 divisors (see below), whose sum is σ = 20852405283840. Its totient is φ = 5560579812096.

The previous prime is 11121221221073. The next prime is 11121221221141. The reversal of 11121221221112 is 21112212212111.

It is a happy number.

It is a super-2 number, since 2×11121221221112² (a number of 27 digits) contains 22 as substring.

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 (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2277368 + ... + 5237255.

It is an arithmetic number, because the mean of its divisors is an integer number (1303275330240).

Almost surely, 2^{11121221221112} is an apocalyptic number.

It is an amenable number.

11121221221112 is a deficient number, since it is larger than the sum of its proper divisors (9731184062728).

11121221221112 is a wasteful number, since it uses less digits than its factorization.

11121221221112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7699622 (or 7699618 counting only the distinct ones).

The product of its digits is 64, while the sum is 20.

Adding to 11121221221112 its reverse (21112212212111), we get a palindrome (32233433433223).

Subtracting 11121221221112 from its reverse (21112212212111), we obtain a palindrome (9990990990999).

The spelling of 11121221221112 in words is "eleven trillion, one hundred twenty-one billion, two hundred twenty-one million, two hundred twenty-one thousand, one hundred twelve".