11221221112 has 8 divisors (see below), whose sum is σ = 21039789600. Its totient is φ = 5610610552.

The previous prime is 11221221103. The next prime is 11221221113. The reversal of 11221221112 is 21112212211.

It is a tau number, because it is divible by the number of its divisors (8).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221221113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 701326312 + ... + 701326327.

It is an arithmetic number, because the mean of its divisors is an integer number (2629973700).

Almost surely, 2^11221221112 is an apocalyptic number.

It is an amenable number.

11221221112 is a deficient number, since it is larger than the sum of its proper divisors (9818568488).

11221221112 is a wasteful number, since it uses less digits than its factorization.

11221221112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1402652645 (or 1402652641 counting only the distinct ones).

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

Adding to 11221221112 its reverse (21112212211), we get a palindrome (32333433323).

The spelling of 11221221112 in words is "eleven billion, two hundred twenty-one million, two hundred twenty-one thousand, one hundred twelve".