11120212221 has 12 divisors (see below), whose sum is σ = 15074014176. Its totient is φ = 7291935120.

The previous prime is 11120212163. The next prime is 11120212237. The reversal of 11120212221 is 12221202111.

It is not a de Polignac number, because 11120212221 - 2⁷ = 11120212093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11120212221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11120212021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 486921 + ... + 509246.

It is an arithmetic number, because the mean of its divisors is an integer number (1256167848).

Almost surely, 2^11120212221 is an apocalyptic number.

It is an amenable number.

11120212221 is a deficient number, since it is larger than the sum of its proper divisors (3953801955).

11120212221 is an frugal number, since it uses more digits than its factorization.

11120212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 996292 (or 996231 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 11120212221 its reverse (12221202111), we get a palindrome (23341414332).

The spelling of 11120212221 in words is "eleven billion, one hundred twenty million, two hundred twelve thousand, two hundred twenty-one".