11122012221 has 16 divisors (see below), whose sum is σ = 16066822464. Its totient is φ = 6816225024.

The previous prime is 11122012207. The next prime is 11122012229. The reversal of 11122012221 is 12221022111.

It is not a de Polignac number, because 11122012221 - 2⁶ = 11122012157 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11122012221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11122012229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2533606 + ... + 2537991.

It is an arithmetic number, because the mean of its divisors is an integer number (1004176404).

Almost surely, 2^11122012221 is an apocalyptic number.

It is an amenable number.

11122012221 is a deficient number, since it is larger than the sum of its proper divisors (4944810243).

11122012221 is a wasteful number, since it uses less digits than its factorization.

11122012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5071660.

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

Adding to 11122012221 its reverse (12221022111), we get a palindrome (23343034332).

The spelling of 11122012221 in words is "eleven billion, one hundred twenty-two million, twelve thousand, two hundred twenty-one".