11221002212121 has 16 divisors (see below), whose sum is σ = 17902453672320. Its totient is φ = 6905232130320.

The previous prime is 11221002212117. The next prime is 11221002212137. The reversal of 11221002212121 is 12121220012211.

11221002212121 is a `hidden beast` number, since 11 + 221 + 0 + 0 + 221 + 212 + 1 = 666.

It is not a de Polignac number, because 11221002212121 - 2² = 11221002212117 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11221002212094 and 11221002212103.

It is not an unprimeable number, because it can be changed into a prime (11221002212111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15984333285 + ... + 15984333986.

It is an arithmetic number, because the mean of its divisors is an integer number (1118903354520).

Almost surely, 2^{11221002212121} is an apocalyptic number.

It is an amenable number.

11221002212121 is a deficient number, since it is larger than the sum of its proper divisors (6681451460199).

11221002212121 is a wasteful number, since it uses less digits than its factorization.

11221002212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31968667293 (or 31968667287 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 11221002212121 its reverse (12121220012211), we get a palindrome (23342222224332).

The spelling of 11221002212121 in words is "eleven trillion, two hundred twenty-one billion, two million, two hundred twelve thousand, one hundred twenty-one".