11221022121111 has 32 divisors (see below), whose sum is σ = 18520836019200. Its totient is φ = 6655925427840.

The previous prime is 11221022121013. The next prime is 11221022121119. The reversal of 11221022121111 is 11112122012211.

It is a happy number.

11221022121111 is a `hidden beast` number, since 1 + 1 + 221 + 0 + 221 + 211 + 11 = 666.

It is not a de Polignac number, because 11221022121111 - 2³⁰ = 11219948379287 is a prime.

It is a super-2 number, since 2×11221022121111² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221022121119) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 401913906 + ... + 401941823.

It is an arithmetic number, because the mean of its divisors is an integer number (578776125600).

Almost surely, 2^{11221022121111} is an apocalyptic number.

11221022121111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11221022121111 is a deficient number, since it is larger than the sum of its proper divisors (7299813898089).

11221022121111 is a wasteful number, since it uses less digits than its factorization.

11221022121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803855796 (or 803855790 counting only the distinct ones).

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

Adding to 11221022121111 its reverse (11112122012211), we get a palindrome (22333144133322).

The spelling of 11221022121111 in words is "eleven trillion, two hundred twenty-one billion, twenty-two million, one hundred twenty-one thousand, one hundred eleven".