11221211202111 has 224 divisors, whose sum is σ = 19341839923200. Its totient is φ = 6462994406400.

The previous prime is 11221211202083. The next prime is 11221211202119. The reversal of 11221211202111 is 11120211212211.

It is a happy number.

11221211202111 is a `hidden beast` number, since 1 + 1 + 221 + 211 + 20 + 211 + 1 = 666.

It is not a de Polignac number, because 11221211202111 - 2⁵ = 11221211202079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221211202119) by changing a digit.

It is a polite number, since it can be written in 223 ways as a sum of consecutive naturals, for example, 1117756830 + ... + 1117766868.

Almost surely, 2^{11221211202111} is an apocalyptic number.

11221211202111 is a deficient number, since it is larger than the sum of its proper divisors (8120628721089).

11221211202111 is a wasteful number, since it uses less digits than its factorization.

11221211202111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10241 (or 10226 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 11221211202111 its reverse (11120211212211), we get a palindrome (22341422414322).

It can be divided in two parts, 1122121 and 1202111, that added together give a palindrome (2324232).

The spelling of 11221211202111 in words is "eleven trillion, two hundred twenty-one billion, two hundred eleven million, two hundred two thousand, one hundred eleven".