11221100121 has 128 divisors (see below), whose sum is σ = 20278702080. Its totient is φ = 5341593600.

The previous prime is 11221100081. The next prime is 11221100141. The reversal of 11221100121 is 12100112211.

11221100121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11221100121 - 2¹¹ = 11221098073 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11221100097 and 11221100106.

It is not an unprimeable number, because it can be changed into a prime (11221100141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 33296865 + ... + 33297201.

It is an arithmetic number, because the mean of its divisors is an integer number (158427360).

Almost surely, 2^11221100121 is an apocalyptic number.

11221100121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11221100121 is a deficient number, since it is larger than the sum of its proper divisors (9057601959).

11221100121 is a wasteful number, since it uses less digits than its factorization.

11221100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 11221100121 its reverse (12100112211), we get a palindrome (23321212332).

The spelling of 11221100121 in words is "eleven billion, two hundred twenty-one million, one hundred thousand, one hundred twenty-one".